Remove "AV Win7" bot.

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

Index: build/masters/master.chromium.perf_av/slaves.cfg
===================================================================
--- build/masters/master.chromium.perf_av/slaves.cfg	(revision 240935)
+++ build/masters/master.chromium.perf_av/slaves.cfg	(working copy)
@@ -1,35 +0,0 @@
-# -*- 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.
-
-slaves = [
-  {
-    'master': 'ChromiumPerfAv',
-    'hostname': 'chromeperf17',
-    'builder': 'AV Linux',
-    'os': 'linux',
-    'version': 'precise',
-    'bits': '64',
-  },
-  {
-    'master': 'ChromiumPerfAv',
-    'hostname': 'chromeperf18',
-    'builder': 'AV Linux Builder',
-    'os': 'linux',
-    'version': 'precise',
-    'bits': '64',
-  },
-  {
-    'master': 'ChromiumPerfAv',
-    'hostname': 'chromeperf33',
-    'builder': 'AV Win7',
-    'os': 'win',
-    'version': 'Win7',
-    'bits': '64',
-  },
-]