mb/**/hda_verb.c: Drop empty files

These files are no longer required by the build system.

Change-Id: I327e7c9211f46d4694591abab11cb38c9180bddb
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/66610
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Nico Huber <nico.h@gmx.de>
Reviewed-by: Michael Niewöhner <foss@mniewoehner.de>

src/mainboard/asus/h61-series/hda_verb.c

@@ -1,3 +0,0 @@
-/* SPDX-License-Identifier: CC-PDDC */
-
-/* Please update the license if adding licensable material. */

src/mainboard/asus/p8x7x-series/hda_verb.c

@@ -1,3 +0,0 @@
-/* SPDX-License-Identifier: CC-PDDC */
-
-/* Please update the license if adding licensable material. */

src/mainboard/dell/snb_ivb_workstations/hda_verb.c

@@ -1,3 +0,0 @@
-/* SPDX-License-Identifier: CC-PDDC */
-
-/* Please update the license if adding licensable material. */

src/mainboard/gigabyte/ga-h61m-series/hda_verb.c

@@ -1,3 +0,0 @@
-/* SPDX-License-Identifier: CC-PDDC */
-
-/* Please update the license if adding licensable material. */

src/mainboard/hp/snb_ivb_laptops/hda_verb.c

@@ -1,3 +0,0 @@
-/* SPDX-License-Identifier: CC-PDDC */
-
-/* Please update the license if adding licensable material. */

src/mainboard/lenovo/t430s/hda_verb.c

@@ -1,5 +0,0 @@
-/* SPDX-License-Identifier: CC-PDDC */
-
-/* Please update the license if adding licensable material. */
-
-/* dummy */

src/mainboard/lenovo/x230/hda_verb.c

@@ -1,5 +0,0 @@
-/* SPDX-License-Identifier: CC-PDDC */
-
-/* Please update the license if adding licensable material. */
-
-/* dummy */