Remove perf bots from chromium.webkit waterfall.

masters/master.chromium.unused/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.
 
 mac_mini_unused = [
   {
     'master': 'ChromiumUnused',
     'hostname': 'mini%d-m1' % i,
     'os': 'mac',
-  } for i in [60, 74]
+  } for i in [6, 60, 74]
 ]
 
 mac_vm_unused = [
   {
     'master': 'ChromiumUnused',
     'hostname': 'vm%d-m1' % i,
     'os': 'mac',
   } for i in [602, 622, 627, 629, 632, 636, 640, 647]
 ]
 
@@ skipping 24 matching lines @@
 linux_vm_unused = [
   {
     'master': 'ChromiumUnused',
     'hostname': 'vm%d-m1' % i,
     'os': 'linux',
   } for i in [ ]
 ]
 
 slaves = (mac_mini_unused + mac_vm_unused + win_build_unused + win_vm_unused +
           linux_build_unused + linux_vm_unused)