x86/traps: Remove superfluous weak definitions and dead code

Those were leftovers of the x86 merge, see

  081f75bbdc86 ("traps: x86: make traps_32.c and traps_64.c equal")

for example and are not needed now.

Signed-off-by: Borislav Petkov <bp@suse.de>

diff --cc arch/x86/kernel/traps.c
Simple merge