Delete non-Chromium style custom GREYAction.

ios/chrome/test/earl_grey/chrome_actions.h

 // Copyright 2016 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_CHROME_TEST_EARL_GREY_CHROME_ACTIONS_H_
 #define IOS_CHROME_TEST_EARL_GREY_CHROME_ACTIONS_H_
 
 #include <string>
 
 #import <EarlGrey/EarlGrey.h>
 
 namespace chrome_test_util {
 
 // Action to longpress on element |element_id| in the Chrome's webview.
 // If |triggers_context_menu| is true, this gesture is expected to
 // cause the context menu to appear, and is not expected to trigger events
 // in the webview. If |triggers_context_menu| is false, the converse is true.
 // This action doesn't fail if the context menu isn't displayed; calling code
 // should check for that separately with a matcher.
 id<GREYAction> LongPressElementForContextMenu(const std::string& element_id,
                                               bool triggers_context_menu);
 
-// TODO(crbug.com/683432): Delete this once downstream code uses the correct
-// format.
-id<GREYAction> longPressElementForContextMenu(const std::string& element_id,
-                                              bool triggers_context_menu);
-
 // Action to turn the switch of a CollectionViewSwitchCell to the given |on|
 // state.
 id<GREYAction> TurnCollectionViewSwitchOn(BOOL on);
 
 }  // namespace chrome_test_util
 
 #endif  // IOS_CHROME_TEST_EARL_GREY_CHROME_ACTIONS_H_