Also remove the relay servers in the tests. Most of the code and the downstream apps are using TurnPort, not RelayPort. Most of the tests in this file are not using RelayPort anyway. BUG=None R=deadbeef@webrtc.org Review URL: https://codereview.webrtc.org/2380923002 . Cr-Commit-Position: refs/heads/master@{#14441}