Remove reference to missing (now global) presubmit.

BUG=none
TEST=none
TBR=yusukes

Change-Id: I49bc09082dc5d9cb3200a50cca74280b94a9455f
Reviewed-on: https://chromium-review.googlesource.com/935291Reviewed-by: Peter Kasting <pkasting@chromium.org>
Commit-Queue: Peter Kasting <pkasting@chromium.org>
Cr-Commit-Position: refs/heads/master@{#538876}

components/arc/PRESUBMIT.py

@@ -20,21 +20,9 @@ def CheckMakeUnique(input_api, output_api):
   return errors
 
 
-def CheckUniquePtr(input_api, output_api):
-  # Runs CheckUniquePtr in cc/PRESUBMIT.py.
-  # Probably, we'd like to promote the check to somewhere to be shared.
-  presubmit_path = (
-      input_api.change.RepositoryRoot() + '/cc/PRESUBMIT.py')
-  presubmit_content = input_api.ReadFile(presubmit_path)
-  global_vars = {}
-  exec(presubmit_content, global_vars)
-  return global_vars['CheckUniquePtr'](input_api, output_api)
-
-
 def CheckChangeOnUpload(input_api, output_api):
   results = []
   results += input_api.canned_checks.CheckChangeLintsClean(
       input_api, output_api)
-  results += CheckUniquePtr(input_api, output_api)
   results += CheckMakeUnique(input_api, output_api)
   return results