Because the republicans reversed their approval, making it moot.
Doesn’t matter. Under Michigan law there is no way for them to take back their certification.
“Aneta Kiersnowski, press secretary for Michigan Secretary of State Jocelyn Benson, told NBC News, “There is no legal mechanism for them to rescind their vote. Their job is done and the next step in the process is for the Board of State Canvassers to meet and certify.”
The board of state canvassers meets on Monday, the 23rd of November. On that date they will certify the votes and that Biden has won Michigan. Rudy and the rest have zero chance to get that certification overturned.