Remove WinClang bot from FYI waterfall.

masters/master.chromium.fyi/slaves.cfg

 # -*- python -*-
 # ex: set syntax=python:
 
 # 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.
 
 # See master.experimental/slaves.cfg for documentation.
 
 
@@ skipping 378 matching lines @@
   {
     'master': 'ChromiumFYI',
     'builder': 'Chromium Win x64 Clobber',
     'hostname': 'build61-m1',
     'os': 'win',
     'version': '2008r2',
     'bits': '64',
   },
   {
     'master': 'ChromiumFYI',
-    'builder': ['WinClang', 'CrWinClang'],
+    'builder': 'CrWinClang',
     'hostname': 'build29-m1',
     'os': 'win',
     'version': 'win7',
     'bits': '64',
   },
   {
     'master': 'ChromiumFYI',
     'builder': 'CrWinClang tester',
     'hostname': 'vm961-m1',
     'os': 'win',
@@ skipping 396 matching lines @@
   },
   {
     'master': 'ChromiumFYI',
     'builder': 'Linux Kitchen (annotated_run)',
     'hostname': 'slave74-c1',
     'os': 'linux',
     'version': 'precise',
     'bits': '64',
   },
 ]