nb/intel/sandybridge: Drop raminit_native.h

After commit adaeb1102186 (nb/intel/sandybridge: Clean up post Haswell SPD mapping API migration), no boards use this header anymore and it
no longer offers original content.

Adjust northbridge code #includes as needed and drop it.

Change-Id: I2785e920bd6188dbfc1a6157351083ec4a2526d0
Signed-off-by: Keith Hui <buurin@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/78785
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Martin L Roth <gaumless@gmail.com>
diff --git a/src/northbridge/intel/sandybridge/raminit_common.c b/src/northbridge/intel/sandybridge/raminit_common.c
index b3f913ef..c2a3051 100644
--- a/src/northbridge/intel/sandybridge/raminit_common.c
+++ b/src/northbridge/intel/sandybridge/raminit_common.c
@@ -11,7 +11,6 @@
 #include <delay.h>
 #include <types.h>
 
-#include "raminit_native.h"
 #include "raminit_common.h"
 #include "raminit_tables.h"
 #include "sandybridge.h"
diff --git a/src/northbridge/intel/sandybridge/raminit_iosav.c b/src/northbridge/intel/sandybridge/raminit_iosav.c
index 12a3be6..fbbbfba 100644
--- a/src/northbridge/intel/sandybridge/raminit_iosav.c
+++ b/src/northbridge/intel/sandybridge/raminit_iosav.c
@@ -3,7 +3,6 @@
 #include <commonlib/helpers.h>
 #include <types.h>
 
-#include "raminit_native.h"
 #include "raminit_common.h"
 #include "raminit_tables.h"
 #include "sandybridge.h"
diff --git a/src/northbridge/intel/sandybridge/raminit_native.c b/src/northbridge/intel/sandybridge/raminit_native.c
index a46390c..fbdc27a 100644
--- a/src/northbridge/intel/sandybridge/raminit_native.c
+++ b/src/northbridge/intel/sandybridge/raminit_native.c
@@ -12,7 +12,7 @@
 #include <stdbool.h>
 #include <stdint.h>
 
-#include "raminit_native.h"
+#include "sandybridge.h"
 #include "raminit_common.h"
 #include "raminit_tables.h"
 
diff --git a/src/northbridge/intel/sandybridge/raminit_native.h b/src/northbridge/intel/sandybridge/raminit_native.h
deleted file mode 100644
index fa0f2ff..0000000
--- a/src/northbridge/intel/sandybridge/raminit_native.h
+++ /dev/null
@@ -1,11 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0-only */
-
-#ifndef RAMINIT_NATIVE_H
-#define RAMINIT_NATIVE_H
-
-#include "sandybridge.h"
-#include <device/dram/ddr3.h>
-#include <stdbool.h>
-#include <stdint.h>
-
-#endif /* RAMINIT_NATIVE_H */