Dropping the scons generator.

test/builddir/src/builddir.gypi

 # Copyright (c) 2009 Google Inc. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 {
   'target_defaults': {
     'configurations': {
       'Default': {
         'msvs_configuration_attributes': {
           'OutputDirectory': '<(DEPTH)\\builddir/Default',
         },
       },
     },
   },
-  'scons_settings': {
-    'sconsbuild_dir': '<(DEPTH)/builddir',
-  },
   'xcode_settings': {
     'SYMROOT': '<(DEPTH)/builddir',
   },
 }