src/cpu: Remove unneeded includes

Change-Id: I8fb03ada29b37f96fb02122462dfb8ec7faa9d31
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/26732
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Nico Huber <nico.h@gmx.de>

src/cpu/x86/tsc/delay_tsc.c

@@ -14,7 +14,6 @@
 #include <arch/early_variables.h>
 #include <console/console.h>
 #include <arch/io.h>
-#include <cpu/x86/msr.h>
 #include <cpu/x86/tsc.h>
 #include <smp/spinlock.h>
 #include <delay.h>