x86: Remove unused variable disable_x2apic

setup_nox2apic() is writing 1 to disable_x2apic but no one is reading it.

Signed-off-by: Jaswinder Singh Rajput <[e-mail]>
Cc: Yinghai Lu <[e-mail]>
Cc: Cyrill Gorcunov <[e-mail]>
LKML-Reference: <[e-mail]>
Signed-off-by: Ingo Molnar <[e-mail]>

arch/x86/kernel/apic/apic.c

···
 #ifdef CONFIG_X86_X2APIC
 /* x2apic enabled before OS handover */
 static int x2apic_preenabled;
-static int disable_x2apic;
 static __init int setup_nox2apic(char *str)
 {
 	if (x2apic_enabled()) {
···
 		return 0;
 	}
 
-	disable_x2apic = 1;
 	setup_clear_cpu_cap(X86_FEATURE_X2APIC);
 	return 0;
 }