I've removed tabless drives from MacBooks before. I tried a homemade tab from a strip of clear package tape, and carefully pushed it into the top of the drive. The sticky part caught good enough to pull out the drive. The same trick didn't work the next time I needed to do that - so removed the top case. I made a tab (again, from clear package tape) to leave on the drive to make the next time easier.
You can also try some really thin needlenose pliers, working from one corner, then the other. That may work...