x86/idt: Remove unused headers

Commit:

  4b9a8dca ("x86/idt: Remove the tracing IDT completely")

removed the 'tracing IDT' from arch/x86/kernel/tracepoint.c,
but left related headers included - remove them.

[ mingo: Tweak changelog. ]

Signed-off-by: sunliming <sunliming@kylinos.cn>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Link: https://lore.kernel.org/r/20220525012827.93464-1-sunliming@kylinos.cn