Remove perf bots from chromium.webkit waterfall.

masters/master.chromium.webkit/slaves.cfg

Index: masters/master.chromium.webkit/slaves.cfg
diff --git a/masters/master.chromium.webkit/slaves.cfg b/masters/master.chromium.webkit/slaves.cfg
index 96059051ff10c9480ab38c22b76c1b5d7c584b31..77873567c29610897a3edd681e27a8770a8e57cf 100644
--- a/masters/master.chromium.webkit/slaves.cfg
+++ b/masters/master.chromium.webkit/slaves.cfg
@@ -219,14 +219,6 @@ slaves = [
   },
   {
     'master': 'ChromiumWebkit',
-    'builder': 'Win7 Perf',
-    'hostname': 'chromeperf42',
-    'os': 'win',
-    'version': 'win7',
-    'bits': '64',
-  },
-  {
-    'master': 'ChromiumWebkit',
     'builder': 'Vista Tests',
     'hostname': 'vm874-m1',
     'os': 'win',
@@ -270,14 +262,6 @@ slaves = [
   },
   {
     'master': 'ChromiumWebkit',
-    'builder': 'Mac10.6 Perf',
-    'hostname': 'mini6-m1',
-    'os': 'mac',
-    'version': '10.6',
-    'bits': '64'
-  },
-  {
-    'master': 'ChromiumWebkit',
     'builder': 'Mac Builder (dbg)',
     'hostname': 'vm645-m1',
     'os': 'mac',
@@ -329,14 +313,6 @@ slaves = [
   },
   {
     'master': 'ChromiumWebkit',
-    'builder': 'Linux Perf',
-    'hostname': 'chromeperf09',
-    'os': 'linux',
-    'version': 'precise',
-    'bits': '64',
-  },
-  {
-    'master': 'ChromiumWebkit',
     'builder': 'GPU Linux (NVIDIA)',
     'hostname': 'gpulin9',
     'os': 'linux',