Take the spudger and place it over the bottom retaining arm so that the former can have a good grip on the latter. When you feel the grip, straightly towards yourself and quite forcefully, push the retaining arm off. You are going to hear a tiny click when the arm will be detached.

Repeat the last operation on the top retaining arm. This time pushing it off towards the opposite direction: as soon as you released the second arm also, the memory module will tilt up immediately.

The top memory module is now released, and, if you're grounded, you can take it out of its slot. Grab the module as it is shown in pic#3 and - maintaining its inclination and making it lightly and repeatedly swing as a pendulum (btw left and right, as the bent blue arrow tries to show) - pull it out and put it away.