Remove "AV Win7" bot.

build/masters/master.chromium.perf_av/master.cfg

Index: build/masters/master.chromium.perf_av/master.cfg
===================================================================
--- build/masters/master.chromium.perf_av/master.cfg	(revision 240781)
+++ build/masters/master.chromium.perf_av/master.cfg	(working copy)
@@ -176,16 +176,6 @@
                              },
                          })
 
-f_win7_rel = F_WIN(slave_type='BuilderTester',
-                   project='all.sln;chromium_builder_perf_av',
-                   target='Release',
-                   tests=perf_av_tests,
-                   factory_properties={
-                     'gclient_env': {'GYP_DEFINES': FFMPEG_GYP_DEFINES_WIN},
-                     'show_perf_results': True,
-                     'expectations': True,
-                     'perf_id': 'win-release'})
-
 # ----------------------------------------------------------------------------
 # BUILDER DEFINITIONS
 
@@ -213,15 +203,9 @@
   'category': '1linux|builders_compile|builder_testers',
 }
 
-b_chromium_rel_win = {'name': 'AV Win7',
-  'factory': f_win7_rel,
-  'category': 'windows',
-}
-
 c['builders'] = [
   b_chromium_rel_linux_builder,
   b_chromium_rel_linux,
-  b_chromium_rel_win,
 ]