Remove old clear browsing data methods on iOS

ios/chrome/browser/ui/commands/clear_browsing_data_command.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/ui/commands/clear_browsing_data_command.h"
 
 #include "base/logging.h"
 #include "ios/chrome/browser/ui/commands/ios_command_ids.h"
 
 @implementation ClearBrowsingDataCommand
@@ skipping 13 matching lines @@
   self = [super initWithTag:IDC_CLEAR_BROWSING_DATA_IOS];
   if (self) {
     DCHECK(browserState);
     _browserState = browserState;
     _mask = mask;
     _timePeriod = timePeriod;
   }
   return self;
 }
 
-- (instancetype)initWithBrowserState:(ios::ChromeBrowserState*)browserState
-                                mask:(int)mask {
-  return [self initWithBrowserState:browserState
-                               mask:mask
-                         timePeriod:browsing_data::ALL_TIME];
-}
-
 @end