Delete a group from the JIRA instance.

        :param groupname: The group to be deleted from the JIRA instance.
        :type groupname: str
        :return: Boolean. Returns True on success.
        :rtype: bool

def remove_group(self, groupname):
        """Delete a group from the JIRA instance.

        :param groupname: The group to be deleted from the JIRA instance.
        :type groupname: str
        :return: Boolean. Returns True on success.
        :rtype: bool
        """
        # implementation based on
        # https://docs.atlassian.com/jira/REST/ondemand/#d2e5173
        url = self._options['server'] + '/rest/api/latest/group'
        x = {'groupname': groupname}
        self._session.delete(url, params=x)
        return True