Or it should be indicated in some other way somewhere in that meta post that the tag has already been removed.
9 hours later…
user46190
1:16 PM
@MartinSleziak agreed. OP could have accepted his own answer, but alas, let me take care of that.
user46190
Due to the three upvotes trumping other answers to this question, I have removed the us-open tag and updated the tag wiki. — mastermind_ed ♦Sep 28 at 14:30