Revert "Initial iOS implementation for webview_flutter. (flutter#890)"

This reverts commit eca232c.

packages/webview_flutter/example/ios/Runner/Info.plist

@@ -39,8 +39,6 @@
 		<string>UIInterfaceOrientationLandscapeLeft</string>
 		<string>UIInterfaceOrientationLandscapeRight</string>
 	</array>
-	<key>io.flutter.embedded_views_preview</key>
-	<true/>
 	<key>UIViewControllerBasedStatusBarAppearance</key>
 	<false/>
 </dict>

packages/webview_flutter/ios/Classes/WebviewFlutterPlugin.m

@@ -0,0 +1,24 @@
+// Copyright 2018 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#import "WebviewFlutterPlugin.h"
+
+@implementation FLTWebviewFlutterPlugin
++ (void)registerWithRegistrar:(NSObject<FlutterPluginRegistrar>*)registrar {
+  FlutterMethodChannel* channel =
+      [FlutterMethodChannel methodChannelWithName:@"webview_flutter"
+                                  binaryMessenger:[registrar messenger]];
+  FLTWebviewFlutterPlugin* instance = [[FLTWebviewFlutterPlugin alloc] init];
+  [registrar addMethodCallDelegate:instance channel:channel];
+}
+
+- (void)handleMethodCall:(FlutterMethodCall*)call result:(FlutterResult)result {
+  if ([@"getPlatformVersion" isEqualToString:call.method]) {
+    result([@"iOS " stringByAppendingString:[[UIDevice currentDevice] systemVersion]]);
+  } else {
+    result(FlutterMethodNotImplemented);
+  }
+}
+
+@end

packages/webview_flutter/lib/webview_flutter.dart

@@ -88,14 +88,6 @@ class _WebViewState extends State<WebView> {
           creationParamsCodec: const StandardMessageCodec(),
         ),
       );
-    } else if (defaultTargetPlatform == TargetPlatform.iOS) {
-      return UiKitView(
-        viewType: 'plugins.flutter.io/webview',
-        onPlatformViewCreated: _onPlatformViewCreated,
-        gestureRecognizers: widget.gestureRecognizers,
-        creationParams: _CreationParams.fromWidget(widget).toMap(),
-        creationParamsCodec: const StandardMessageCodec(),
-      );
     }
     return Text(
         '$defaultTargetPlatform is not yet supported by the webview_flutter plugin');