Remove #include of ptr_util.h in proxy_policy_handler.cc

components/policy/core/browser/proxy_policy_handler.cc

 // Copyright 2013 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.
 
 #include "components/policy/core/browser/proxy_policy_handler.h"
 
 #include <stddef.h>
 
 #include "base/logging.h"
 #include "base/macros.h"
-#include "base/memory/ptr_util.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/values.h"
 #include "components/policy/core/browser/configuration_policy_handler.h"
 #include "components/policy/core/browser/policy_error_map.h"
 #include "components/policy/core/common/policy_map.h"
 #include "components/policy/policy_constants.h"
 #include "components/prefs/pref_value_map.h"
 #include "components/proxy_config/proxy_config_dictionary.h"
 #include "components/proxy_config/proxy_config_pref_names.h"
 #include "components/strings/grit/components_strings.h"
@@ skipping 304 matching lines @@
                          key::kProxyServerMode,
                          IDS_POLICY_OUT_OF_RANGE_ERROR,
                          base::IntToString(server_mode_value));
         return false;
     }
   }
   return true;
 }
 
 }  // namespace policy