src: Remove unused include <halt.h>

Change-Id: I2f142cc80692e60eb0f81f57339a247f6ef4a524
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/32611
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Nico Huber <nico.h@gmx.de>

src/northbridge/intel/sandybridge/raminit.c

@@ -25,7 +25,6 @@
 #include <device/mmio.h>
 #include <device/pci_ops.h>
 #include <cbmem.h>
-#include <halt.h>
 #include <timestamp.h>
 #include <mrc_cache.h>
 #include <southbridge/intel/bd82x6x/me.h>