Revert of WebStateList is an array of web::WebState* wrappers.

ios/shared/chrome/browser/tabs/web_state_handle.h

Index: ios/shared/chrome/browser/tabs/web_state_handle.h
diff --git a/ios/shared/chrome/browser/tabs/web_state_handle.h b/ios/shared/chrome/browser/tabs/web_state_handle.h
deleted file mode 100644
index da765b9c94d9abe8d85a4b92e04f8830ccbdaece..0000000000000000000000000000000000000000
--- a/ios/shared/chrome/browser/tabs/web_state_handle.h
+++ /dev/null
@@ -1,26 +0,0 @@
-// Copyright 2017 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.
-
-#ifndef IOS_SHARED_CHROME_BROWSER_TABS_WEB_STATE_HANDLE_H_
-#define IOS_SHARED_CHROME_BROWSER_TABS_WEB_STATE_HANDLE_H_
-
-namespace web {
-class WebState;
-class WebStateImpl;
-}
-
-// Wraps a web::WebState instance in an Objective-C instance. Allows using
-// Objective-C collection to reference web::WebStates.
-@protocol WebStateHandle
-
-// Returns the wrapped web::WebState.
-@property(nonatomic, readonly) web::WebState* webState;
-
-// Returns the wrapped web::WebState as a web::WebStateImpl. Deprecated,
-// use webState instead if possible.
-@property(nonatomic, readonly) web::WebStateImpl* webStateImpl;
-
-@end
-
-#endif  // IOS_SHARED_CHROME_BROWSER_TABS_WEB_STATE_HANDLE_H_