edison: 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 edison platform and remove
the otherwise empty file.

Acked-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/board/intel/edison/Kconfig b/board/intel/edison/Kconfig
index 5efda4b..daa8d20 100644
--- a/board/intel/edison/Kconfig
+++ b/board/intel/edison/Kconfig
@@ -9,9 +9,6 @@
 config SYS_SOC
 	default "tangier"
 
-config SYS_CONFIG_NAME
-	default "edison"
-
 config SYS_MALLOC_LEN
 	default 0x08000000
 
diff --git a/board/intel/edison/MAINTAINERS b/board/intel/edison/MAINTAINERS
index 4bc4a00..26b27c5 100644
--- a/board/intel/edison/MAINTAINERS
+++ b/board/intel/edison/MAINTAINERS
@@ -2,5 +2,4 @@
 M:	Andy Shevchenko <andriy.shevchenko@linux.intel.com>
 S:	Maintained
 F:	board/intel/edison
-F:	include/configs/edison.h
 F:	configs/edison_defconfig
diff --git a/include/configs/edison.h b/include/configs/edison.h
deleted file mode 100644
index 127c2c4..0000000
--- a/include/configs/edison.h
+++ /dev/null
@@ -1,4 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0+ */
-/*
- * Copyright (c) 2017 Intel Corp.
- */