[ios] Removed checkLinkPresenceUnderGesture API as unused.

ios/web/web_state/ui/crw_web_controller.h

 // Copyright 2012 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_WEB_WEB_STATE_UI_CRW_WEB_CONTROLLER_H_
 #define IOS_WEB_WEB_STATE_UI_CRW_WEB_CONTROLLER_H_
 
 #import <UIKit/UIKit.h>
 
 #import "ios/web/net/crw_request_tracker_delegate.h"
@@ skipping 220 matching lines @@
 - (void)setOverlayPreviewMode:(BOOL)overlayPreviewMode;
 
 // Records the state (scroll position, form values, whatever can be harvested)
 // from the current page into the current session entry.
 - (void)recordStateInHistory;
 // Restores the state for this page from session history.
 // TODO(stuartmorgan): This is public only temporarily; once refactoring is
 // complete it will be handled internally.
 - (void)restoreStateFromHistory;
 
-// Asynchronously checks whether the element at the location of
-// |gestureRecognizer| is a link.
-- (void)checkLinkPresenceUnderGesture:(UIGestureRecognizer*)gestureRecognizer
-                    completionHandler:(void (^)(BOOL))completionHandler;
-
 // Notifies the CRWWebController that it has been shown.
 - (void)wasShown;
 
 // Notifies the CRWWebController that it has been hidden.
 - (void)wasHidden;
 
 // Returns |YES| if the current page should show the keyboard shield.
 - (BOOL)wantsKeyboardShield;
 
 // Returns |YES| if the current page should should the location bar hint text.
@@ skipping 68 matching lines @@
 
 // Acts on a single message from the JS object, parsed from JSON into a
 // DictionaryValue. Returns NO if the format for the message was invalid.
 - (BOOL)respondToMessage:(base::DictionaryValue*)crwMessage
        userIsInteracting:(BOOL)userIsInteracting
                originURL:(const GURL&)originURL;
 
 @end
 
 #endif  // IOS_WEB_WEB_STATE_UI_CRW_WEB_CONTROLLER_H_