arch/x86/postcar_loader: Remove unused 'include <cpu/cpu.h>'

Change-Id: I5a36f5729a1a5ad5819ebb3c46b775ba52237d65
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/42080
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/arch/x86/postcar_loader.c

@@ -3,7 +3,6 @@
 #include <arch/romstage.h>
 #include <cbmem.h>
 #include <console/console.h>
-#include <cpu/cpu.h>
 #include <cpu/x86/msr.h>
 #include <cpu/x86/mtrr.h>
 #include <cpu/x86/smm.h>