utils.network.remotes_on_remote_tcp_port: Use comment instead of string literal

************* Module salt.utils.network
salt/utils/network.py:1022: [W0105(pointless-string-statement), remotes_on_remote_tcp_port] String statement has no effect
Merge pull request #15439 from hulu/comment

utils.network.remotes_on_remote_tcp_port: Use comment instead of string literal