hc2910-2aghd05: Remove empty config header

Now that we support having CONFIG_SYS_CONFIG_NAME be unset to indicate a
lack of board.h file, unset this on the hc2910-2aghd05 platform and remove
the otherwise empty file.

Signed-off-by: Tom Rini <trini@konsulko.com>

include/configs/hc2910-2aghd05.h

@@ -1,6 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0+ */
-
-#ifndef __HC2910_2AGHD05_CONFIG_H__
-#define __HC2910_2AGHD05_CONFIG_H__
-
-#endif