[MTD] Remove zero-length files mtdbdi.c and internal.ho

Both were "removed" in commit a33eb6b91034c95b9b08576f68be170f995b2c7d.

Signed-off-by: Jeff Garzik <jgarzik@redhat.com>

authored by Jeff Garzik and committed by Jeff Garzik 0fd6b32b 8777c793

drivers/mtd/internal.h
drivers/mtd/mtdbdi.c