Remove dead neonDrawLighting code

Source/platform/BUILD.gn

 # Copyright 2014 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/config/ui.gni")
 import("//third_party/WebKit/Source/build/scripts/scripts.gni")
 import("//third_party/WebKit/Source/config.gni")
 import("//third_party/WebKit/Source/platform/platform_generated.gni")
 
 platform_gypi = exec_script(
     "//build/gypi_to_gn.py",
     [ rebase_path("blink_platform.gypi") ],
     "scope",
     [ "blink_platform.gypi" ])
 # TODO(GYP) Uncomment when the targets below that need this value are enabled.
 #heap_gypi = exec_script(
 #    "//build/gypi_to_gn.py",
 #    [ rebase_path("heap/blink_heap.gypi") ],
 #    "scope",
 #    [ "heap/blink_heap.gypi" ])
 blink_platform_neon_files = [
   "graphics/cpu/arm/WebGLImageConversionNEON.h",
   "graphics/cpu/arm/filters/FEBlendNEON.h",
   "graphics/cpu/arm/filters/FECompositeArithmeticNEON.h",
   "graphics/cpu/arm/filters/FEGaussianBlurNEON.h",
-  "graphics/cpu/arm/filters/FELightingNEON.h",
   "graphics/cpu/arm/filters/NEONHelpers.h",
 ]
 
 # blink_common in blink_platform.gyp
 component("blink_common") {
   sources = [
     "exported/WebCString.cpp",
     "exported/WebString.cpp",
     "exported/WebCommon.cpp",
   ]
@@ skipping 409 matching lines @@
     #'cflags': ['-marm'],
     #    'conditions': [
     #      ['OS=="android"', {
     #        'cflags!': ['-mthumb'],
     #      }],
     #    ],
 
     deps = [ ":blink_common" ]
   }
 }