Remove the presubmit check that counts the number of owners

tools/perf/contrib/PRESUBMIT.py

 # Copyright 2017 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.
 
 
 def _CommonChecks(input_api, output_api):
   """Performs common checks, which includes running pylint."""
   results = []
 
   results.extend(_CheckContribDir(input_api, output_api))
   return results
 
 
 def _CheckOwnershipForContribSubDir(sub_dir, input_api, output_api):
   results = []
   owner_file = input_api.os_path.join(sub_dir, 'OWNERS')
   if not input_api.os_path.isfile(owner_file):
     results.append(output_api.PresubmitError(
         '%s must have an OWNERS file' % sub_dir))
-  else:
-    owners = []
-    with open(owner_file) as f:
-      for line in f:
-        if line.strip() and not line.strip().startswith('#'):
-          owners.append(line)
-    if len(owners) < 2:
-      results.append(output_api.PresubmitError(
-          '%s must have at least 2 owners' % owner_file))
   return results
 
 
 def _CheckContribDir(input_api, output_api):
   """ Check to make sure that:
     1) tools/perf/contrib/ contains only directories, except __init__.py,
     README.md, and PRESUBMIT.py file
     2) Every subdirectory in tools/perf/contrib/ must have an OWNERS file with
     at least two OWNERS.
   """
@@ skipping 27 matching lines @@
 def CheckChangeOnUpload(input_api, output_api):
   report = []
   report.extend(_CommonChecks(input_api, output_api))
   return report
 
 
 def CheckChangeOnCommit(input_api, output_api):
   report = []
   report.extend(_CommonChecks(input_api, output_api))
   return report