Revert of Creating framework for drawShadowedPicture

gyp/common.gypi

 # Copyright 2011 The Android Open Source Project
 #
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 #
 # This file is automatically included by gyp_skia when building any target.
 
 {
   'includes': [
     'common_variables.gypi',
@@ skipping 94 matching lines @@
                 'cflags': [
                   '-Wno-array-bounds',
                   '-Wno-maybe-uninitialized',
                   '-Wno-strict-overflow',
                 ],
               }],
             ],
           },
         },
       }],
-      [ 'skia_experimental_shadowing',
-        {
-          'defines': [
-            'SK_experimental_shadowing',
-          ],
-        },
-      ],
     ],
   }, # end 'target_defaults'
 }