@classmethod<EOL><INDENT>def remove_timezone(cls, timestr):<DEDENT>
if re.match(r"<STR_LIT>", timestr):<EOL><INDENT>return re.sub(<EOL>r"<STR_LIT>",<EOL>r"<STR_LIT>",<EOL>timestr<EOL>)<EOL><DEDENT>
Completely remove timezone information, if any.

        :return: the new string if timezone was found, `None` otherwise