nb/intel/raminit: Remove unused headers

Change-Id: Ic6e7341b53bcabc415089ccfab121d3694ccb071
Signed-off-by: Patrick Rudolph <siro@das-labor.org>
Reviewed-on: https://review.coreboot.org/28212
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>

src/northbridge/intel/sandybridge/raminit_common.c

@@ -16,12 +16,8 @@
  */
 
 #include <console/console.h>
-#include <console/usb.h>
 #include <string.h>
 #include <arch/io.h>
-#include <cbmem.h>
-#include <arch/cbfs.h>
-#include <cbfs.h>
 #include <northbridge/intel/sandybridge/chip.h>
 #include <device/pci_def.h>
 #include <delay.h>