Fix win_optional_gpu_tests_rel.

scripts/slave/recipe_modules/chromium_tests/trybots.py

 # Copyright 2015 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.
 
 from recipe_engine.types import freeze
 
 
 def simple_bot(bot_id, analyze_mode=None):
   return {
     'bot_ids': [bot_id],
@@ skipping 541 matching lines @@
           {
             'mastername': 'chromium.gpu.fyi',
             'buildername': 'GPU Win Builder',
             'tester': 'Optional Win7 Release (NVIDIA)',
           },
           {
             'mastername': 'chromium.gpu.fyi',
             'buildername': 'GPU Win Builder',
             'tester': 'Win7 Release (ATI)',
           },
-          {
-            'mastername': 'chromium.gpu.fyi',
-            'buildername': 'GPU Win Builder',
-            'tester': 'Optional Win7 Release (ATI)',
-          },
         ],
       },
       # Optional Official trybot.
       'win_chrome_official': simple_bot({
         'mastername': 'chromium.chrome',
         'buildername': 'Google Chrome Win',
       }),
     },
   },
   'tryserver.v8': {
     'builders': {
       'v8_linux_blink_rel': simple_bot({
         'mastername': 'chromium.webkit',
         'buildername': 'WebKit Linux',
       }),
       'v8_linux_chromium_gn_rel': simple_bot({
         'mastername': 'client.v8.fyi',
         'buildername': 'V8 Linux GN',
       }),
       'v8_android_chromium_gn_dbg': simple_bot({
         'mastername': 'client.v8.fyi',
         'buildername': 'V8 Android GN (dbg)',
       }),
     },
   },
 })