Actually there’s no reason to don’t remove both of them. I understand your point, you would like to extract the data then you probably won’t use the drive anymore as a reliable data storage. The protection provided by TVS diodes and fuses (0 value resistors) is not bulletproof, you never know what else burnt. Even if those units are able to work for some more time, they could be dead soon.
Don’t cut them off please, you might damage the PCB. If you have a good soldering iron, try to hold the diode with a forceps and warm up the two edges with the iron until you can remove it without forcing it.
TVS diodes just the half of the protection, usually there’s a zero value smd resistor belongs to each of them / each of the power lines. One for the 5V and one for the 12V. You must short them with a piece of wire if they damaged. Check R64 and R67, but I just guessing, don’t take it serious and close them to short until you are sure. It’s also not 100% they burnt. You must use a multimeter to measure them. On my WD board the zero value resistors have a text with “000”. Probably the circle sign means the same on your board.