Remove extraneous Python version from presubmit warnings

When a presubmit warning is triggered this message is printed:

    There were Python 3 presubmit warnings.

The Python version information was useful when we were transitioning
our presubmits from Python 2 to Python 3, but that transition is long
finished, and now that information is just noise.

This change deletes the excess information.

Change-Id: I4e43e1c9daf36daaaa9430d76ad557c800cf962b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/5907924
Commit-Queue: Gavin Mak <gavinmak@google.com>
Reviewed-by: Gavin Mak <gavinmak@google.com>
Auto-Submit: Bruce Dawson <brucedawson@chromium.org>

presubmit_support.py

@@ -1611,8 +1611,7 @@ def DoPostUploadExecuter(change, gerrit_obj, verbose):
         gerrit_obj: The GerritAccessor object.
         verbose: Prints debug info.
     """
-    python_version = 'Python %s' % sys.version_info.major
-    sys.stdout.write('Running %s post upload checks ...\n' % python_version)
+    sys.stdout.write('Running post upload checks ...\n')
     presubmit_files = ListRelevantPresubmitFiles(
         change.LocalPaths() + change.LocalSubmodules(), change.RepositoryRoot())
     if not presubmit_files and verbose:
@@ -1923,13 +1922,10 @@ def DoPresubmitChecks(change,
         1 if presubmit checks failed or 0 otherwise.
     """
     with setup_environ({'PYTHONDONTWRITEBYTECODE': '1'}):
-        python_version = 'Python %s' % sys.version_info.major
         if committing:
-            sys.stdout.write('Running %s presubmit commit checks ...\n' %
-                             python_version)
+            sys.stdout.write('Running presubmit commit checks ...\n')
         else:
-            sys.stdout.write('Running %s presubmit upload checks ...\n' %
-                             python_version)
+            sys.stdout.write('Running presubmit upload checks ...\n')
         start_time = time_time()
         presubmit_files = ListRelevantPresubmitFiles(
             change.AbsoluteLocalPaths() + change.AbsoluteLocalSubmodules(),
@@ -1987,18 +1983,16 @@ def DoPresubmitChecks(change,
                              total_time)
 
         if not should_prompt and not presubmits_failed:
-            sys.stdout.write('%s presubmit checks passed.\n\n' % python_version)
+            sys.stdout.write('presubmit checks passed.\n\n')
         elif should_prompt and not presubmits_failed:
-            sys.stdout.write('There were %s presubmit warnings. ' %
-                             python_version)
+            sys.stdout.write('There were presubmit warnings. ')
             if may_prompt:
                 presubmits_failed = not prompt_should_continue(
                     'Are you sure you wish to continue? (y/N): ')
             else:
                 sys.stdout.write('\n')
         else:
-            sys.stdout.write('There were %s presubmit errors.\n' %
-                             python_version)
+            sys.stdout.write('There were presubmit errors.\n')
 
         if json_output:
             # Write the presubmit results to json output

tests/presubmit_unittest.py

@@ -43,7 +43,7 @@ import subprocess2 as subprocess
 # Shortcut.
 presubmit_canned_checks = presubmit.presubmit_canned_checks
 
-RUNNING_PY_CHECKS_TEXT = ('Running Python 3 presubmit upload checks ...\n')
+RUNNING_PY_CHECKS_TEXT = ('Running presubmit upload checks ...\n')
 
 # Access to a protected member XXX of a client class
 # pylint: disable=protected-access
@@ -621,7 +621,7 @@ class PresubmitUnittest(PresubmitTestsBase):
             presubmit.DoPostUploadExecuter(change=change,
                                            gerrit_obj=None,
                                            verbose=False))
-        expected = (r'Running Python 3 post upload checks \.\.\.\n')
+        expected = (r'Running post upload checks \.\.\.\n')
         self.assertRegexpMatches(sys.stdout.getvalue(), expected)
 
     def testDoPostUploadExecuterWarning(self):
@@ -636,7 +636,7 @@ class PresubmitUnittest(PresubmitTestsBase):
                                            gerrit_obj=None,
                                            verbose=False))
         self.assertEqual(
-            'Running Python 3 post upload checks ...\n'
+            'Running post upload checks ...\n'
             '\n'
             '** Post Upload Hook Messages **\n'
             '??\n'
@@ -654,7 +654,7 @@ class PresubmitUnittest(PresubmitTestsBase):
                                            gerrit_obj=None,
                                            verbose=False))
 
-        expected = ('Running Python 3 post upload checks \.\.\.\n'
+        expected = ('Running post upload checks \.\.\.\n'
                     '\n'
                     '\*\* Post Upload Hook Messages \*\*\n'
                     '!!\n'
@@ -894,7 +894,7 @@ def CheckChangeOnCommit(input_api, output_api):
                 RUNNING_PY_CHECKS_TEXT + 'Warning, no PRESUBMIT.py found.\n'
                 'Running default presubmit script.\n'
                 '** Presubmit ERRORS: 1 **\n!!\n\n'
-                'There were Python 3 presubmit errors.\n'
+                'There were presubmit errors.\n'
                 'Was the presubmit check useful? If not, run "git cl presubmit -v"\n'
                 'to figure out which PRESUBMIT.py was run, then run "git blame"\n'
                 'on the file to figure out who to ask for help.\n')