Use of this library has significant performance implications. While
we're probably not too badly affected, we don't actually need to use it
here. The 'parse_version' utility it exposes is intended to parse
PEP440-compliant version identifiers, not the simple microversions
placement uses, which the 'microversion_parse' library can competently
parse for us.
Change-Id: I9b7281caec6fa53600dea316492d052787cf799b
Signed-off-by: Stephen Finucane <stephenfin@redhat.com>