My understanding: A lower court had halted the Texas ID law on the grounds it conflicted with the Voter’s Right Act. Since the Supreme Court threw out the Voter’s Right Act (or the list of states covered by it, which resulted in the same outcome). The lower court ruling was not moot, so it was dismissed as well. Result - Voter ID law goes into effect in Texas.
That’s how I read it too.
Looks like a good thing!