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

PRESUBMIT.py

Index: PRESUBMIT.py
===================================================================
--- PRESUBMIT.py	(revision 233621)
+++ PRESUBMIT.py	(working copy)
@@ -1036,7 +1036,7 @@
   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):
@@ -1056,7 +1056,6 @@
       'linux_rel',
       'mac_rel',
       'mac:compile',
-      'win7_aura',
       'win_rel',
       'win:compile',
       'win_x64_rel:base_unittests',