Don't send try jobs to win7_aura since it's a subset of win_rel and will go away.

PRESUBMIT.py

 # 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.
 
 """Top-level presubmit script for Chromium.
 
 See http://dev.chromium.org/developers/how-tos/depottools/presubmit-scripts
 for more details about the presubmit API built into gcl.
 """
 
@@ skipping 1018 matching lines @@
 
 def GetPreferredTrySlaves(project, change):
   files = change.LocalPaths()
 
   if not files or all(re.search(r'[\\/]OWNERS$', f) for f in files):
     return []
 
   if all(re.search('\.(m|mm)$|(^|[/_])mac[/_.]', f) for f in files):
     return ['mac_rel', 'mac:compile']
   if all(re.search('(^|[/_])win[/_.]', f) for f in files):
-    return ['win_rel', 'win7_aura', 'win:compile']
+    return ['win_rel', 'win:compile']
   if all(re.search('(^|[/_])android[/_.]', f) for f in files):
     return ['android_aosp', 'android_dbg', 'android_clang_dbg']
   if all(re.search('^native_client_sdk', f) for f in files):
     return ['linux_nacl_sdk', 'win_nacl_sdk', 'mac_nacl_sdk']
   if all(re.search('[/_]ios[/_.]', f) for f in files):
     return ['ios_rel_device', 'ios_dbg_simulator']
 
   trybots = [
       'android_clang_dbg',
       'android_dbg',
       'ios_dbg_simulator',
       'ios_rel_device',
       'linux_asan',
       'linux_aura',
       'linux_chromeos',
       'linux_clang:compile',
       'linux_rel',
       'mac_rel',
       'mac:compile',
-      'win7_aura',
       'win_rel',
       'win:compile',
       'win_x64_rel:base_unittests',
   ]
 
   # Match things like path/aura/file.cc and path/file_aura.cc.
   # Same for chromeos.
   if any(re.search('[/_](aura|chromeos)', f) for f in files):
     trybots += ['linux_chromeos_clang:compile', 'linux_chromeos_asan']
 
   # If there are gyp changes to base, build, or chromeos, run a full cros build
   # in addition to the shorter linux_chromeos build. Changes to high level gyp
   # files have a much higher chance of breaking the cros build, which is
   # differnt from the linux_chromeos build that most chrome developers test
   # with.
   if any(re.search('^(base|build|chromeos).*\.gypi?$', f) for f in files):
     trybots += ['cros_x86']
 
   # The AOSP bot doesn't build the chrome/ layer, so ignore any changes to it
   # unless they're .gyp(i) files as changes to those files can break the gyp
   # step on that bot.
   if (not all(re.search('^chrome', f) for f in files) or
       any(re.search('\.gypi?$', f) for f in files)):
     trybots += ['android_aosp']
 
   return trybots