src/sys/boot/common/load.c unused ?

while debugging the misbehaviour of pxeboot on certain machines,
i noticed that the file src/sys/boot/common/load.c seems to be
unused -- in fact, i could not find a reference to this file (or the
filedup() function that it implements) anywhere.

Is it supposed to be used somehow, or it is ok to remove it ?

cheers
luigi