Revert deprecation of clearCookies (#4566)

Author: BeMacized

packages/webview_flutter/webview_flutter_platform_interface/CHANGELOG.md

@@ -1,3 +1,7 @@
+## 1.6.1
+
+* Revert deprecation of `clearCookies` in WebViewPlatform for later deprecation.
+
 ## 1.6.0
 
 * Adds platform interface for cookie manager.

packages/webview_flutter/webview_flutter_platform_interface/lib/src/platform_interface/webview_platform.dart

@@ -59,7 +59,7 @@ abstract class WebViewPlatform {
   /// Clears all cookies for all [WebView] instances.
   ///
   /// Returns true if cookies were present before clearing, else false.
-  @Deprecated('Use `WebViewCookieManagerPlatform.clearCookies` instead.')
+  /// Soon to be deprecated. 'Use `WebViewCookieManagerPlatform.clearCookies` instead.
   Future<bool> clearCookies() {
     throw UnimplementedError(
         'WebView clearCookies is not implemented on the current platform');

packages/webview_flutter/webview_flutter_platform_interface/pubspec.yaml

@@ -4,7 +4,7 @@ repository: https://github.com/flutter/plugins/tree/master/packages/webview_flut
 issue_tracker: https://github.com/flutter/flutter/issues?q=is%3Aissue+is%3Aopen+label%3A%22p%3A+webview_flutter%22
 # NOTE: We strongly prefer non-breaking changes, even at the expense of a
 # less-clean API. See https://flutter.dev/go/platform-interface-breaking-changes
-version: 1.6.0
+version: 1.6.1
 
 environment:
   sdk: ">=2.12.0 <3.0.0"