Remove set but unsed variables.

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.
 
 import("//build_overrides/v8.gni")
 import("//testing/test.gni")
 import("pdfium.gni")
 
 config("pdfium_config") {
   cflags = []
@@ skipping 1248 matching lines @@
       "xfa/src/fxbarcode/qrcode/BC_QRDetectorResult.h",
       "xfa/src/fxbarcode/qrcode/BC_QRFinderPattern.cpp",
       "xfa/src/fxbarcode/qrcode/BC_QRFinderPattern.h",
       "xfa/src/fxbarcode/qrcode/BC_QRFinderPatternFinder.cpp",
       "xfa/src/fxbarcode/qrcode/BC_QRFinderPatternFinder.h",
       "xfa/src/fxbarcode/qrcode/BC_QRGridSampler.cpp",
       "xfa/src/fxbarcode/qrcode/BC_QRGridSampler.h",
       "xfa/src/fxbarcode/utils.h",
       "xfa/src/fxfa/src/app/xfa_checksum.cpp",
       "xfa/src/fxfa/src/app/xfa_checksum.h",
-      "xfa/src/fxfa/src/app/xfa_ffConfigAcc.cpp",
-      "xfa/src/fxfa/src/app/xfa_ffConfigAcc.h",
       "xfa/src/fxfa/src/app/xfa_ffapp.cpp",
       "xfa/src/fxfa/src/app/xfa_ffapp.h",
       "xfa/src/fxfa/src/app/xfa_ffbarcode.cpp",
       "xfa/src/fxfa/src/app/xfa_ffbarcode.h",
       "xfa/src/fxfa/src/app/xfa_ffcheckbutton.cpp",
       "xfa/src/fxfa/src/app/xfa_ffcheckbutton.h",
       "xfa/src/fxfa/src/app/xfa_ffchoicelist.cpp",
       "xfa/src/fxfa/src/app/xfa_ffchoicelist.h",
       "xfa/src/fxfa/src/app/xfa_ffdoc.cpp",
       "xfa/src/fxfa/src/app/xfa_ffdoc.h",
@@ skipping 231 matching lines @@
       "//v8:v8_libplatform",
     ]
     include_dirs += [
       "//v8",
       "//v8/include",
     ]
     configs += [ "//v8:external_startup_data" ]
   }
   configs += [ ":pdfium_config" ]
 }