remove a rally point

def remove_rally(self, key):
        '''remove a rally point'''
        a = key.split(' ')
        if a[0] != 'Rally' or len(a) != 2:
            print("Bad rally object %s" % key)
            return
        i = int(a[1])
        self.mpstate.functions.process_stdin('rally remove %u' % i)