Remove Win Aura bots from the buildbot and tryservers since they're now redundant as trunk Windows …

masters/master.tryserver.chromium/slaves.cfg

Index: masters/master.tryserver.chromium/slaves.cfg
===================================================================
--- masters/master.tryserver.chromium/slaves.cfg	(revision 234533)
+++ masters/master.tryserver.chromium/slaves.cfg	(working copy)
@@ -488,9 +488,6 @@
 def windows():
   win7 = (range(103, 106) + range(111, 114) + range(118, 152) +
           range(300, 384) + range(510, 519) + range(525, 530))
-  new_win7 = (range(164, 207) + range(208, 211) + range(212, 215) +
-          range(216, 219) + range(220, 223) + range(224, 227) +
-          range(228, 231))
   win7_x64 = range(231, 234) + range(235, 252) + range(750, 782)
   perf_bisect_slave_ids = [82]
   perf_a4_slaves = [2, 3]
@@ -544,18 +541,6 @@
                      range(782, 786) + range(790, 798) + range(427, 430) +
                      range(498, 501))
   ]
-  win7_aura_slaves = [
-    {
-      'master': 'TryServer',
-      'builder': [
-        'win7_aura'
-      ],
-      'hostname': 'vm%d-m4' % number,
-      'os': 'win',
-      'version': 'win7',
-      'bits': '64',
-    } for number in new_win7
-  ]
   win8_aura_slaves = [
     {
       'master': 'TryServer',
@@ -666,7 +651,6 @@
       normal_slaves +
       nacl_sdk_slaves +
       layout_slaves +
-      win7_aura_slaves +
       win8_aura_slaves +
       drmemory_slaves +
       chromeframe_slave +