x86/apic: Finish removing unused callbacks

x86/apic: Finish removing unused callbacks

The ->cpu_mask_to_apicid() and ->vector_allocation_domain() callbacks are
now unused, so remove them.

Signed-off-by: David Rientjes <[email protected]>
Cc: Juergen Gross <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Fixes: baab1e84b112 ("x86/apic: Remove unused callbacks")
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Ingo Molnar <[email protected]>