Remove Windows/AMD from chromium.gpu and win_chromium_rel_ng.

masters/master.chromium.gpu/slaves.cfg

 # Copyright (c) 2012 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.
 
 slaves = [
   {
     'master': 'ChromiumGPU',
     'hostname': 'vm88-m1',
     'builder': 'GPU Win Builder',
     'os': 'win',
@@ skipping 41 matching lines @@
     'bits': '64',
     'recipe': 'chromium',
     'build_config': 'Debug',
     # This bot uses recipe-side triggers.
     'triggered_by': 'none',
     # Nearly all bots on these waterfalls are auto-rebooted between
     # runs for stability.
   },
   {
     'master': 'ChromiumGPU',
-    'hostname': 'vm101-m1',
-    'builder': 'Win7 Release (ATI)',
-    'os': 'win',
-    'version': 'win7',
-    'bits': '64',
-    'recipe': 'chromium',
-    'build_config': 'Release',
-    # This bot uses recipe-side triggers.
-    'triggered_by': 'none',
-    # Nearly all bots on these waterfalls are auto-rebooted between
-    # runs for stability.
-  },
-  {
-    'master': 'ChromiumGPU',
     'hostname': 'vm612-m1',
     'builder': 'GPU Mac Builder',
     'os': 'mac',
     'version': '10.8',
     'bits': '64',
     'recipe': 'chromium',
     'build_config': 'Release',
     'gatekeeper_categories': 'compile',
     # Nearly all bots on these waterfalls are auto-rebooted between
     # runs for stability.
@@ skipping 121 matching lines @@
     'bits': '64',
     'recipe': 'chromium',
     'build_config': 'Debug',
     # This bot uses recipe-side triggers.
     'triggered_by': 'none',
     # This physical host is shared between multiple builders and can't
     # be auto-rebooted.
     'auto_reboot': False,
   },
 ]