refactor: Remove redundant supertypes (#4369)

src/main/java/spoon/reflect/cu/position/NoSourcePosition.java

@@ -12,12 +12,11 @@
 import spoon.support.reflect.cu.CompilationUnitImpl;
 
 import java.io.File;
-import java.io.Serializable;
 
 /**
  * This class represents the position of a program element in a source file.
  */
-public class NoSourcePosition implements SourcePosition, Serializable {
+public class NoSourcePosition implements SourcePosition {
 
 	private static final long serialVersionUID = 1L;
 

src/main/java/spoon/reflect/declaration/CtConstructor.java

@@ -17,7 +17,7 @@
 /**
  * This element defines a constructor declaration.
  */
-public interface CtConstructor<T> extends CtExecutable<T>, CtTypeMember, CtFormalTypeDeclarer, CtShadowable {
+public interface CtConstructor<T> extends CtExecutable<T>, CtFormalTypeDeclarer, CtShadowable {
 
 	/**
 	 * Always returns "&lt;init&gt;".

src/main/java/spoon/reflect/declaration/CtMethod.java

@@ -19,7 +19,7 @@
 /**
  * This element defines a method declaration.
  */
-public interface CtMethod<T> extends CtExecutable<T>, CtTypeMember, CtFormalTypeDeclarer, CtShadowable {
+public interface CtMethod<T> extends CtExecutable<T>, CtFormalTypeDeclarer, CtShadowable {
 	/**
 	 * @param superMethod to be checked method
 	 * @return true if this method overrides `superMethod`.<br>

src/main/java/spoon/reflect/visitor/filter/AbstractReferenceFilter.java

@@ -8,7 +8,6 @@
 package spoon.reflect.visitor.filter;
 
 import spoon.reflect.reference.CtReference;
-import spoon.reflect.visitor.Filter;
 
 /**
  * This class defines an abstract reference filter that needs to be subclassed
@@ -17,7 +16,7 @@
  * @param <T>
  * 		the type of the reference to be matched
  */
-public abstract class AbstractReferenceFilter<T extends CtReference> extends AbstractFilter<T> implements Filter<T> {
+public abstract class AbstractReferenceFilter<T extends CtReference> extends AbstractFilter<T> {
 
 	/**
 	 * Creates a reference filter with the type of the potentially matching

src/main/java/spoon/support/reflect/cu/position/BodyHolderSourcePositionImpl.java

@@ -10,14 +10,12 @@
 import spoon.reflect.cu.CompilationUnit;
 import spoon.reflect.cu.position.BodyHolderSourcePosition;
 
-import java.io.Serializable;
-
 /**
  * This class represents the position of a Java program element in a source
  * file.
  */
 public class BodyHolderSourcePositionImpl extends DeclarationSourcePositionImpl
-		implements BodyHolderSourcePosition, Serializable {
+		implements BodyHolderSourcePosition {
 
 	private static final long serialVersionUID = 1L;
 	private int bodyStart;

src/main/java/spoon/support/reflect/cu/position/CompoundSourcePositionImpl.java

@@ -10,14 +10,12 @@
 import spoon.reflect.cu.CompilationUnit;
 import spoon.reflect.cu.position.CompoundSourcePosition;
 
-import java.io.Serializable;
-
 /**
  * This class represents the position of a named Java program element in a source
  * file.
  */
 public class CompoundSourcePositionImpl extends SourcePositionImpl
-		implements CompoundSourcePosition, Serializable {
+		implements CompoundSourcePosition {
 
 	private static final long serialVersionUID = 1L;
 	private int declarationSourceStart;

src/main/java/spoon/support/reflect/cu/position/DeclarationSourcePositionImpl.java

@@ -11,14 +11,12 @@
 import spoon.reflect.cu.CompilationUnit;
 import spoon.reflect.cu.position.DeclarationSourcePosition;
 
-import java.io.Serializable;
-
 /**
  * This class represents the position of a Java program element in a source
  * file.
  */
 public class DeclarationSourcePositionImpl extends CompoundSourcePositionImpl
-		implements DeclarationSourcePosition, Serializable, Cloneable {
+		implements DeclarationSourcePosition, Cloneable {
 
 	private static final long serialVersionUID = 1L;
 	private int modifierSourceEnd;

src/main/java/spoon/support/reflect/cu/position/SourcePositionImpl.java

@@ -15,14 +15,13 @@
 import spoon.reflect.cu.position.NoSourcePosition;
 
 import java.io.File;
-import java.io.Serializable;
 import java.util.Arrays;
 
 /**
  * This immutable class represents the position of a Java program element in a source
  * file.
  */
-public class SourcePositionImpl implements SourcePosition, Serializable {
+public class SourcePositionImpl implements SourcePosition {
 
 	private static final long serialVersionUID = 1L;
 

src/main/java/spoon/support/reflect/declaration/CtElementImpl.java

@@ -53,8 +53,6 @@
 import spoon.support.visitor.equals.CloneHelper;
 import spoon.support.visitor.equals.EqualsVisitor;
 import spoon.support.visitor.replace.ReplacementVisitor;
-
-import java.io.Serializable;
 import java.lang.annotation.Annotation;
 import java.lang.invoke.MethodHandles;
 import java.util.ArrayList;
@@ -72,7 +70,7 @@
  * Contains the default implementation of most CtElement methods.
  *
  */
-public abstract class CtElementImpl implements CtElement, Serializable {
+public abstract class CtElementImpl implements CtElement {
 	private static final long serialVersionUID = 1L;
 	protected static final Logger LOGGER = LoggerFactory.getLogger(MethodHandles.lookup().lookupClass());
 	public static final String ERROR_MESSAGE_TO_STRING = "Error in printing the node. One parent isn't initialized!";