x86: Remove empty files

Remove empty files which were supposed to get removed with the
respective commits removing the functionality in them:

$ find arch/x86/ -empty
arch/x86/lib/mmx_32.c
arch/x86/include/asm/fpu/internal.h
arch/x86/include/asm/mmx.h

Signed-off-by: Borislav Petkov <[email protected]>
Link: https://lore.kernel.org/r/[email protected]

Author: suryasaimadhu