argparse: do not use commandline.argparse

Use the module directly rather than relying on commandline importing
it itself.

BUG=None
TEST=CQ passes

Change-Id: I79d3c272e01062924bc8b4ad24904cab764a2798
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/chromite/+/3585789
Commit-Queue: Mike Frysinger <vapier@chromium.org>
Tested-by: Mike Frysinger <vapier@chromium.org>
Auto-Submit: Mike Frysinger <vapier@chromium.org>
Reviewed-by: Sergey Frolov <sfrolov@google.com>
Commit-Queue: Sergey Frolov <sfrolov@google.com>
diff --git a/scripts/sync_chrome.py b/scripts/sync_chrome.py
index 68de31a..cbcf31e 100644
--- a/scripts/sync_chrome.py
+++ b/scripts/sync_chrome.py
@@ -4,6 +4,7 @@
 
 """Sync the Chrome source code used by Chrome OS to the specified directory."""
 
+import argparse
 import logging
 import os
 
@@ -28,8 +29,7 @@
                       action='store_true', default=False)
   parser.add_argument('--reset', help='Revert local changes',
                       action='store_true', default=False)
-  parser.add_argument('--gclient', help=commandline.argparse.SUPPRESS,
-                      default=None)
+  parser.add_argument('--gclient', help=argparse.SUPPRESS, default=None)
   parser.add_argument('--gclient_template', help='Template gclient input file')
   parser.add_argument('--skip_cache', help='Skip using git cache',
                       dest='use_cache', action='store_false')