The House Intelligence Committee told a federal judge Wednesday that it has withdrawn its subpoena in the impeachment inquiry for former National Security Council official Charles Kupperman and does not plan to reissue it.

The committee argues that the lawsuit Kupperman filed should now be moot because he “faces no pending, imminent, or foreseeable injury” for not complying with a subpoena.

[Most Republicans on impeachment committees aren’t showing up, transcripts reveal]

And if U.S. District Senior Judge Richard J. Leon does not agree, the committee said it will move to dismiss the lawsuit and end the separation-of-powers showdown.

Leon last week scheduled oral arguments for Dec. 10 and suggested he would rule in late December or early January, a timeline that appears too slow for the House Democrats’ accelerating impeachment inquiry.