Remove unused usings from example and exemplar

[no important files changed]

exercises/concept/attack-of-the-trolls/.meta/Exemplar.cs

@@ -1,5 +1,3 @@
-using System;
-
 enum AccountType
 {
     Guest,

exercises/concept/authentication-system/.meta/Exemplar.cs

@@ -1,4 +1,3 @@
-using System.Collections.Generic;
 using System.Collections.ObjectModel;
 
 public class Authenticator

exercises/concept/beauty-salon-goes-global/.meta/Exemplar.cs

@@ -1,4 +1,3 @@
-using System;
 using System.Globalization;
 using System.Runtime.InteropServices;
 

exercises/concept/bird-watcher/.meta/Exemplar.cs

@@ -1,5 +1,3 @@
-using System;
-
 class BirdCount
 {
     private int[] birdsPerDay;

exercises/concept/booking-up-for-beauty/.meta/Exemplar.cs

@@ -1,5 +1,3 @@
-using System;
-
 static class Appointment
 {
     public static DateTime Schedule(string appointmentDateDescription)

exercises/concept/building-telemetry/.meta/Exemplar.cs

@@ -1,6 +1,3 @@
-using System;
-
-
 public class RemoteControlCar
 {
     private int batteryPercentage = 100;

exercises/concept/calculator-conundrum/.meta/Exemplar.cs

@@ -1,5 +1,3 @@
-using System;
-
 public static class SimpleCalculator
 {
     public static string Calculate(int operand1, int operand2, string operation)

exercises/concept/developer-privileges/.meta/Exemplar.cs

@@ -1,6 +1,3 @@
-using System;
-using System.Collections.Generic;
-
 public class Authenticator
 {
     public Identity Admin { get; } = new Identity

exercises/concept/faceid-2/.meta/Exemplar.cs

@@ -1,6 +1,3 @@
-using System;
-using System.Collections.Generic;
-
 public class FacialFeatures
 {
     public string EyeColor { get; }

exercises/concept/football-match-reports/.meta/Exemplar.cs

@@ -1,5 +1,3 @@
-using System;
-
 public static class PlayAnalyzer
 {
     public static string AnalyzeOnField(int shirtNum)

exercises/concept/high-school-sweethearts/.meta/Exemplar.cs

@@ -1,4 +1,3 @@
-using System;
 using System.Globalization;
 
 public static class HighSchoolSweethearts

exercises/concept/hyper-optimized-telemetry/.meta/Exemplar.cs

@@ -1,5 +1,3 @@
-using System;
-
 public static class TelemetryBuffer
 {
     public static byte[] ToBuffer(long reading)

exercises/concept/hyperia-forex/.meta/Exemplar.cs

@@ -1,6 +1,3 @@
-using System;
-using System.Runtime.InteropServices;
-
 public struct CurrencyAmount
 {
     private decimal amount;

exercises/concept/hyperinflation-hits-hyperia/.meta/Exemplar.cs

@@ -1,5 +1,3 @@
-using System;
-
 public static class CentralBank
 {
     public static string DisplayDenomination(long @base, long multiplier)

exercises/concept/instruments-of-texas/.meta/Exemplar.cs

@@ -1,5 +1,3 @@
-using System;
-
 public class CalculationException : Exception
 {
     public CalculationException(int operand1, int operand2, string message, Exception inner) : base(message, inner)

exercises/concept/interest-is-interesting/.meta/Exemplar.cs

@@ -1,5 +1,3 @@
-using System;
-
 static class SavingsAccount
 {
     public static float InterestRate(decimal balance)

exercises/concept/international-calling-connoisseur/.meta/Exemplar.cs

@@ -1,6 +1,3 @@
-using System;
-using System.Collections.Generic;
-
 public static class DialingCodes
 {
     public static Dictionary<int, string> GetEmptyDictionary()

exercises/concept/land-grab-in-space/.meta/Exemplar.cs

@@ -1,7 +1,3 @@
-using System;
-using System.Collections.Generic;
-using System.Reflection;
-
 public struct Coord
 {
     public Coord(ushort x, ushort y)

exercises/concept/log-analysis/.meta/Exemplar.cs

@@ -1,5 +1,3 @@
-using System;
-
 public static class LogAnalysis 
 {
     public static string SubstringAfter(this string str, string delimiter)

exercises/concept/object-relational-mapping/.meta/Exemplar.cs

@@ -1,5 +1,3 @@
-using System;
-
 public class Orm : IDisposable
 {
     private Database database;

exercises/concept/orm-in-one-go/.meta/Exemplar.cs

@@ -1,5 +1,3 @@
-using System;
-
 public class Orm
 {
     private Database database;

exercises/concept/remote-control-competition/.meta/Exemplar.cs

@@ -1,6 +1,3 @@
-using System;
-using System.Collections.Generic;
-
 public interface IRemoteControlCar
 {
     void Drive();

exercises/concept/roll-the-die/.meta/Exemplar.cs

@@ -1,5 +1,3 @@
-using System;
-
 public class Player
 {
     private static Random random = new Random();

exercises/concept/squeaky-clean/.meta/Exemplar.cs

@@ -1,4 +1,3 @@
-using System;
 using System.Text;
 
 public static class Identifier

exercises/concept/the-weather-in-deather/.meta/Exemplar.cs

@@ -1,6 +1,3 @@
-using System;
-using System.Collections.Generic;
-
 public class WeatherStation
 {
     private Reading reading;

exercises/concept/tracks-on-tracks-on-tracks/.meta/Exemplar.cs

@@ -1,5 +1,3 @@
-using System.Collections.Generic;
-
 public static class Languages
 {
     public static List<string> NewList()

exercises/concept/weighing-machine/.meta/Exemplar.cs

@@ -1,5 +1,3 @@
-using System;
-
 class WeighingMachine
 {
     private double _weight;

exercises/practice/accumulate/.meta/Example.cs

@@ -1,6 +1,3 @@
-using System;
-using System.Collections.Generic;
-
 public static class AccumulateExtensions
 {
     public static IEnumerable<U> Accumulate<T, U>(this IEnumerable<T> collection, Func<T, U> func)

exercises/practice/acronym/.meta/Example.cs

@@ -1,5 +1,3 @@
-using System.Collections.Generic;
-using System.Linq;
 using System.Text.RegularExpressions;
 
 public static class Acronym

exercises/practice/affine-cipher/.meta/Example.cs

@@ -1,6 +1,3 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
 using System.Text;
 
 public static class AffineCipher

exercises/practice/all-your-base/.meta/Example.cs

@@ -1,7 +1,3 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-
 public static class AllYourBase
 {
     public static int[] Rebase(int inputBase, int[] inputDigits, int outputBase)

exercises/practice/allergies/.meta/Example.cs

@@ -1,7 +1,3 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-
 [Flags]
 public enum Allergen
 {

exercises/practice/alphametics/.meta/Example.cs

@@ -1,7 +1,3 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-
 public static class Alphametics
 {
     public static IDictionary<char, int> Solve(string equation) => AlphameticsSolver.Solve(Parse(equation));

exercises/practice/anagram/.meta/Example.cs

@@ -1,7 +1,3 @@
-using System;
-using System.Linq;
-using System.Collections.Generic;
-
 public class Anagram
 {
     private string baseWord;

exercises/practice/armstrong-numbers/.meta/Example.cs

@@ -1,5 +1,3 @@
-using System;
-
 public static class ArmstrongNumbers
 {
     public static bool IsArmstrongNumber(int number)

exercises/practice/atbash-cipher/.meta/Example.cs

@@ -1,7 +1,3 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-
 public static class AtbashCipher
 {
     private const int BlockSize = 5;

exercises/practice/bank-account/.meta/Example.cs

@@ -1,5 +1,3 @@
-using System;
-
 public class BankAccount
 {
     private readonly object _lock = new object();

exercises/practice/beer-song/.meta/Example.cs

@@ -1,5 +1,3 @@
-using System.Linq;
-
 public static class BeerSong
 {
     public static string Verse(int number)

exercises/practice/binary-search-tree/.meta/Example.cs

@@ -1,7 +1,4 @@
-using System;
 using System.Collections;
-using System.Collections.Generic;
-using System.Linq;
 
 public class BinarySearchTree : IEnumerable<int>
 {

exercises/practice/binary/.meta/Example.cs

@@ -1,6 +1,3 @@
-using System;
-using System.Linq;
-
 public class Binary
 {
     public static int ToDecimal(string binary)

exercises/practice/book-store/.meta/Example.cs

@@ -1,7 +1,3 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-
 public static class BookStore
 {
     private const decimal BookPrice = 8.0m;

exercises/practice/bowling/.meta/Example.cs

@@ -1,6 +1,3 @@
-using System.Collections.Generic;
-using System;
-
 public class BowlingGame
 {
     private const int NumberOfFrames = 10;

exercises/practice/change/.meta/Example.cs

@@ -1,7 +1,3 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-
 public static class Change
 {
     public static int[] FindFewestCoins(int[] coins, int target)

exercises/practice/circular-buffer/.meta/Example.cs

@@ -1,7 +1,3 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-
 public class CircularBuffer<T>
 {
     private readonly int capacity;

exercises/practice/clock/.meta/Example.cs

@@ -1,5 +1,3 @@
-using System;
-
 public struct Clock
 {
     public Clock(int hours, int minutes = 0)

exercises/practice/collatz-conjecture/.meta/Example.cs

@@ -1,5 +1,3 @@
-using System;
-
 public static class CollatzConjecture
 {
     public static int Steps(int number)

exercises/practice/complex-numbers/.meta/Example.cs

@@ -1,5 +1,3 @@
-using System;
-
 public record ComplexNumber(double R, double I)
 {
     public double Real() => R;

exercises/practice/connect/.meta/Example.cs

@@ -1,6 +1,3 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
 using System.Text.RegularExpressions;
 
 public enum ConnectWinner

exercises/practice/crypto-square/.meta/Example.cs

@@ -1,7 +1,3 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-
 public static class CryptoSquare
 {
     public static string NormalizedPlaintext(string plaintext) => new string(plaintext.ToLowerInvariant().Where(char.IsLetterOrDigit).ToArray());

exercises/practice/custom-set/.meta/Example.cs

@@ -1,6 +1,3 @@
-using System.Collections.Generic;
-using System.Linq;
-
 public class CustomSet
 {
     private readonly SortedDictionary<int, int> items = new SortedDictionary<int, int>();

exercises/practice/darts/.meta/Example.cs

@@ -1,5 +1,3 @@
-using System;
-
 public static class Darts
 {
     public static int Score(double x, double y)

exercises/practice/diamond/.meta/Example.cs

@@ -1,6 +1,3 @@
-using System;
-using System.Linq;
-
 public static class Diamond
 {
     public static string Make(char target)

exercises/practice/difference-of-squares/.meta/Example.cs

@@ -1,6 +1,3 @@
-using System;
-using System.Linq;
-
 public static class DifferenceOfSquares
 {
     public static int CalculateSquareOfSum(int max)

exercises/practice/diffie-hellman/.meta/Example.cs

@@ -1,4 +1,3 @@
-using System;
 using System.Numerics;
 
 public static class DiffieHellman

exercises/practice/dnd-character/.meta/Example.cs

@@ -1,7 +1,3 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-
 public class DndCharacter
 {
     private static readonly Random Random = new Random();

exercises/practice/dominoes/.meta/Example.cs

@@ -1,7 +1,3 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-
 public static class Dominoes
 {
     public static bool CanChain(IEnumerable<(int, int)> dominoes)

exercises/practice/dot-dsl/.meta/Example.cs

@@ -1,5 +1,4 @@
 using System.Collections;
-using System.Collections.Generic;
 
 public class Node : Element
 {

exercises/practice/error-handling/.meta/Example.cs

@@ -1,5 +1,3 @@
-using System;
-
 public static class ErrorHandling
 {
     public static void HandleErrorByThrowingException()

exercises/practice/etl/.meta/Example.cs

@@ -1,5 +1,3 @@
-using System.Collections.Generic;
-
 public static class Etl
 {
     public static Dictionary<string, int> Transform(Dictionary<int, string[]> old)

exercises/practice/food-chain/.meta/Example.cs

@@ -1,5 +1,3 @@
-using System.Linq;
-
 public static class FoodChain
 {
     private const int Verses = 8;