Prior to undertaking our bathroom remodel I watched a lot of YouTube videos (as you do) and when it came to removing the shower pan they all looked the same. After removing the grill, there was a large black gasket surrounding the drain pipe. They drilled out the gasket, grabbed it with some needle-nose pliers, and Bob's your uncle.

I popped the grill off my drain and found this

No gasket, nothing soft and pliable at all. Everything seems to be hard plastic or PVC. So how do I go about removing this?