Remove deprecated method method UserFeedbackProviderImpl

The 1-parameter version of CreateViewController() was deprecated by
http://crrev/c/1833788 and is no longer needed or implemented.
This is clean up, no functional changes.

Bug: None
Change-Id: I5459dcbd198333dcc421fc3107d3f075ea68559e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1834876Reviewed-by: Eugene But <eugenebut@chromium.org>
Commit-Queue: Peter Lee <pkl@chromium.org>
Cr-Commit-Position: refs/heads/master@{#702078}

ios/public/provider/chrome/browser/user_feedback/user_feedback_provider.h

@@ -49,11 +49,6 @@ class UserFeedbackProvider {
   virtual UIViewController* CreateViewController(
       id<UserFeedbackDataSource> data_source,
       id<ApplicationCommands> dispatcher);
-  // DEPRECATED: CreateViewController(data_source) is deprecated.
-  // Use CreateViewController(data_source, tab_opener) instead. This will be
-  // removed once all implementers of UserFeedbackProvider stopped using this.
-  virtual UIViewController* CreateViewController(
-      id<UserFeedbackDataSource> data_source);
   // Uploads collected feedback reports.
   virtual void Synchronize();
 

ios/public/provider/chrome/browser/user_feedback/user_feedback_provider.mm

@@ -22,9 +22,4 @@ UIViewController* UserFeedbackProvider::CreateViewController(
   return nil;
 }
 
-UIViewController* UserFeedbackProvider::CreateViewController(
-    id<UserFeedbackDataSource> data_source) {
-  return CreateViewController(data_source, nil);
-}
-
 void UserFeedbackProvider::Synchronize() {}