src: Remove unused '#include <cpu/x86/smm.h>'

Change-Id: I1632d03a7a73de3e3d3a83bf447480b0513873e7
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/41685
Reviewed-by: David Guckian
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/cpu/intel/haswell/haswell_init.c

@@ -13,7 +13,6 @@
 #include <cpu/intel/speedstep.h>
 #include <cpu/intel/turbo.h>
 #include <cpu/x86/name.h>
-#include <cpu/x86/smm.h>
 #include <delay.h>
 #include <northbridge/intel/haswell/haswell.h>
 #include <southbridge/intel/lynxpoint/pch.h>