Attached after a verb: there is no need to ...; it is hardly necessary to ...
そんなに謝るまでもないよ。
You don't need to apologize that much.
説明するまでもないが、規則は掲示板にある。
I need hardly explain, but the rules are on the bulletin board.
言うまでもないが、安全第一だ。
Needless to say, safety comes first.