There's probably some sort of removal tool to make it easier.
You could DIY one out of a chopstick or similar:
Make a wedge, when inserted in the gap, that will push in the direction of the yellow arrows. Have it no thicker (or less) than the green line.
Then use pliers to squeeze the tabs in the direction of the orange arrows while pushing the wedge into the gap.
An assistant, or a bit of pretension of the PCB, can help lift the PCB out off the clip.