Remove unused CFX_QuartzDevice(Driver) classes.

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_common_config") {
   cflags = []
@@ skipping 742 matching lines @@
     "core/fxge/android/cfpf_skiafont.cpp",
     "core/fxge/android/cfpf_skiafont.h",
     "core/fxge/android/cfpf_skiafontdescriptor.h",
     "core/fxge/android/cfpf_skiafontmgr.cpp",
     "core/fxge/android/cfpf_skiafontmgr.h",
     "core/fxge/android/cfpf_skiapathfont.h",
     "core/fxge/android/cfx_androidfontinfo.cpp",
     "core/fxge/android/cfx_androidfontinfo.h",
     "core/fxge/android/fx_android_imp.cpp",
     "core/fxge/apple/apple_int.h",
-    "core/fxge/apple/cfx_quartzdevice.h",
     "core/fxge/apple/fx_mac_imp.cpp",
     "core/fxge/apple/fx_quartz_device.cpp",
     "core/fxge/cfx_facecache.h",
     "core/fxge/cfx_fontcache.h",
     "core/fxge/cfx_fontmapper.h",
     "core/fxge/cfx_fontmgr.h",
     "core/fxge/cfx_fxgedevice.h",
     "core/fxge/cfx_gemodule.h",
     "core/fxge/cfx_graphstate.h",
     "core/fxge/cfx_graphstatedata.h",
@@ skipping 979 matching lines @@
 }
 
 if (pdf_is_standalone) {
   source_set("samples") {
     testonly = true
     deps = [
       "//samples",
     ]
   }
 }