Move depot_tools presubmit trybot from chromium.linux to infra.

masters/master.tryserver.chromium.linux/slaves.cfg

 # -*- python -*-
 # ex: set syntax=python:
 # Copyright 2014 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.
 
 def linux():
   cq_slaves = (range(111, 131) + range(162, 399) + range(427, 453) +
@@ skipping 75 matching lines @@
     result.append({
       'master': 'TryServerChromiumLinux',
       'os': 'linux',
       'version': 'precise',
       'bits': '64',
       'builder': 'linux_chromium_cfi_rel_ng',
       'hostname': 'slave%d-c4' % slave,  # Super beefy machines.
       'pool': 'linux_chromium_cfi_rel_ng',
     })
 
-  # Trusty slave for depot_tools_presubmit
-  result.extend([
-    {
-      'master': 'TryServerChromiumLinux',
-      'os': 'linux',
-      'version': 'trusty',
-      'bits': '64',
-      'builder': ['depot_tools_presubmit'],
-      'hostname': 'slave426-c4',
-      'pool': 'depot_tools_presubmit',
-    }
-  ])
-
   linux_full_bisect_builder_slaves = [747, 748]
   result.extend(
     {
       'master': 'TryServerChromiumLinux',
       'os': 'linux',
       'version': 'precise',
       'bits': '64',
       'builder': 'linux_full_bisect_builder',
       'hostname': 'slave%d-c4' % i,
       'pool': 'linux_full_bisect_builder',
@@ skipping 29 matching lines @@
       'builder': ['linux_chromium_browser_side_navigation_rel'],
       'hostname': 'slave914-c4',
       'pool': 'linux_chromium_browser_side_navigation_rel',
     }
   ])
 
   return result
 
 
 slaves = linux()