Garage door needs light switch on to operate
There's no problem leaving the socket empty, if it cannot be reached and there's no chance of critters getting into it. However, it would be more convenient to have light when you need it. There are motion-sensing LED lamps for less than US$5/each that screw into standard Edison-base sockets, which seem to be what your photo show. The lamps turn on when you go past, and turn off a short time after motion ceases. Look in local stores; I've purchased some for less than $US3.