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/cros.py b/scripts/cros.py
index 5530157..b071f20 100644
--- a/scripts/cros.py
+++ b/scripts/cros.py
@@ -13,6 +13,7 @@
 See cli/ for actual command implementations.
 """
 
+import argparse
 import logging
 
 from chromite.cli import command
@@ -42,7 +43,7 @@
       sub_parser = subparsers.add_parser(
           cmd_name, description=class_def.__doc__, epilog=epilog,
           caching=class_def.use_caching_options,
-          formatter_class=commandline.argparse.RawDescriptionHelpFormatter)
+          formatter_class=argparse.RawDescriptionHelpFormatter)
       class_def.AddParser(sub_parser)
     else:
       subparsers.add_parser(subcommand, add_help=False)