<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def remove_tcp_port(self, port):
 """ Removes an associated TCP port number from this project. :param port: TCP port number """


        if port in self._used_tcp_ports:
            self._used_tcp_ports.remove(port)