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/generate_reclient_inputs.py b/scripts/generate_reclient_inputs.py
index a477c47..0144957 100644
--- a/scripts/generate_reclient_inputs.py
+++ b/scripts/generate_reclient_inputs.py
@@ -18,6 +18,7 @@
 Contact: Chrome OS toolchain team.
 """
 
+import argparse
 import os
 from pathlib import Path
 from typing import List, Optional, Set
@@ -90,7 +91,7 @@
       sudo=True)
 
 
-def ParseArgs(argv: Optional[List[str]]) -> commandline.argparse.Namespace:
+def ParseArgs(argv: Optional[List[str]]) -> argparse.Namespace:
   """Parses program arguments."""
   parser = commandline.ArgumentParser(description=__doc__)