{cpu,soc}/intel: remove unused smm_init() function

There used to be a need for an empty smm_init() function
because initialize_cpus() called it even though nothing
called initialize_cpus(). However, garbage collection at
link time is implemented so there's no reason to provide an
empty function to satisfy a symbol that is completely culled
during link. Remove it.

Change-Id: Ic13c85f1d3d57e38e7132e4289a98a95829f765a
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: https://review.coreboot.org/14605
Tested-by: build bot (Jenkins)
Reviewed-by: Duncan Laurie <dlaurie@google.com>
Reviewed-by: Furquan Shaikh <furquan@google.com>

src/cpu/intel/haswell/smmrelocate.c

@@ -352,15 +352,6 @@ void smm_relocate(void)
 		smm_initiate_relocation();
 }
 
-void smm_init(void)
-{
-	/* smm_init() is normally called from initialize_cpus() in
-	 * lapic_cpu_init.c. However, that path is no longer used. Don't reuse
-	 * the function name because that would cause confusion.
-	 * The smm_initialize() function above is used to setup SMM at the
-	 * appropriate time. */
-}
-
 void smm_lock(void)
 {
 	/* LOCK the SMM memory window and enable normal SMM.