I went to go log in to see what I had left there, first off it wouldn't let me see the one review I had written, and second I'm now stuck in a "community" popup that won't let me proceed without employment info.
From there you can at least deactivate your account, not sure what other pages are also accessible without going through the modal.
I'm not sure if they got removed in their entirety, or if Glassdoor just disconnected them from my profile.