[ios] Remove the openJavascript method from Tab.

ios/chrome/browser/tabs/tab.mm

 // 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.
 
 #import "ios/chrome/browser/tabs/tab.h"
 
 #import <CoreLocation/CoreLocation.h>
 #import <UIKit/UIKit.h>
 
 #include <utility>
@@ skipping 1154 matching lines @@
       addLocationToNavigationItem:self.currentSessionEntry.navigationItem
                      browserState:browserState_];
 }
 
 - (void)loadSessionTab:(const sessions::SessionTab*)sessionTab {
   DCHECK(sessionTab);
   [self replaceHistoryWithNavigations:sessionTab->navigations
                          currentIndex:sessionTab->current_navigation_index];
 }
 
-- (void)openJavascript:(NSString*)javaScript {
-  DCHECK(javaScript);
-  javaScript = [javaScript stringByRemovingPercentEncoding];
-  if (webStateImpl_)
-    webStateImpl_->ExecuteJavaScript(base::SysNSStringToUTF16(javaScript));
-}
-
 - (void)reload {
   // TODO(crbug.com/661671): Convert callers to go through CRWWebController
   // directly and remove this passthrough method.
   [self.webController reload];
 }
 
 - (void)webWillReload {
   if ([parentTabModel_ tabUsageRecorder]) {
     [parentTabModel_ tabUsageRecorder]->RecordReload(self);
   }
@@ skipping 1142 matching lines @@
 
 - (TabModel*)parentTabModel {
   return parentTabModel_;
 }
 
 - (FormInputAccessoryViewController*)inputAccessoryViewController {
   return inputAccessoryViewController_.get();
 }
 
 @end