I would add to this. Instead of plain deleting them, just move them to a drive where you have more space (even external USB or a slower mechanical HDD on your system) and make a symbolic link to the folder in the original location fs-base-cgl. That way if it does ever need them, it seamlessly thinks they are still there.
If it’s not there after a sim update it throws a wobbly so you do still have to have them. I found this out after the SU11 update lol