The argparse module has been builtin to Python since
Python 3.2, released in 2011 (see
https://docs.python.org/3/whatsnew/3.2.html). Further,
the argparse pip module has not been released or updated
since 2015, and lacks some of the features of the modern,
built-in argparse. Drop the pip installed version in
favor of the built-in version.
Signed-off-by: Chris Lalancette <clalancette@gmail.com>
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