Banned user tests differ for local and remote

[oliverpool]

I was looking at matrix-org/dendrite#1331 and found the following.

In the ban test (https://github.com/matrix-org/sytest/blob/develop/tests/30rooms/07ban.pl) the Remote banned user has the following check, which is not present on the local user:

->then( sub {
         repeat_until_true {
            matrix_get_room_state( $banned_user, $room_id,
               type      => "m.room.member",
               state_key => $banned_user->user_id,
            )->main::check_http_code(
               403 => "ok",
               200 => "redo",
            );
         };
      })

If I read the spec correctly, the matrix_get_room_state should not return a 403 (You aren't a member of the room and weren't previously a member of the room.: the user was a member before being banned).

I guess those lines should be removed.