Drop argparse as a dependency

argparse has been part of the standard library since Python 2.7,
so there's no reason to declare this as a dependency, since it cannot
be satisfied by anyone running a modern Linux distribution including
a supported version of Python.

Author: Conan-Kudo

setup.py

@@ -24,7 +24,6 @@
   long_description=open('README.md').read(),
   #data_files=[('conf/manatools', ['XXX.yy',]), ],
   install_requires=[
-    "argparse",
     "dbus-python",
     "python-gettext",
     "PyYAML",