tor-bugs is already documented in gitlab#6

tsa/howto/gitlab.md

@@ -500,9 +500,6 @@ Note that those labels are being worked on [ticket 4](https://gitlab.torproject.
 
 As of June 17th:
 
- 3. Make sure TPO project issue change notifications are emailed to
-    the [tor-bugs](https://lists.torproject.org/cgi-bin/mailman/listinfo/tor-bugs) mailing list.
-
  4. Begin handing out some of the accounts to community members that
     we have created in their name(s).