remove the change vhost forward.

@@ -553,8 +553,6 @@ vhost same.vhost.forward.srs.com {
     # this used to split/forward the current stream for cluster active-standby,
     # this used to split/forward the current stream for cluster active-standby,
     # active-active for cdn to build high available fault tolerance system.
     # active-active for cdn to build high available fault tolerance system.
     # format: {ip}:{port} {ip_N}:{port_N}
     # format: {ip}:{port} {ip_N}:{port_N}
-    # or specify the vhost by params, @see: change.vhost.forward.srs.com
-    # if vhost not specified, use the request vhost instead.
     forward         127.0.0.1:1936 127.0.0.1:1937;
     forward         127.0.0.1:1936 127.0.0.1:1937;
 }
 }