Revert of [ObjC ARC] Converts ios/chrome/browser/ui/autofill:autofill to ARC.Automatically generated ARCMig…

ios/chrome/browser/ui/autofill/BUILD.gn

 # 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.
 
 source_set("autofill") {
-  configs += [ "//build/config/compiler:enable_arc" ]
   sources = [
     "autofill_client_ios.h",
     "autofill_client_ios.mm",
     "autofill_save_card_infobar.mm",
   ]
   deps = [
     "//base",
     "//components/autofill/core/browser",
     "//components/autofill/core/common",
     "//components/autofill/ios/browser",
     "//components/infobars/core",
     "//components/keyed_service/core",
     "//components/password_manager/core/browser",
     "//components/prefs",
     "//google_apis",
     "//ios/chrome/browser",
     "//ios/chrome/browser/autofill",
     "//ios/chrome/browser/browser_state",
     "//ios/chrome/browser/infobars",
     "//ios/public/provider/chrome/browser",
   ]
 }