zephyr: move kconfig to the zephyr tree

Kconfig file is now in modules/ in the zephyr tree.

Signed-off-by: Anas Nashif <anas.nashif@intel.com>

Kconfig

@@ -1,20 +0,0 @@
-#
-# Copyright (c) 2018 Linaro Limited
-#
-# SPDX-License-Identifier: Apache-2.0
-#
-
-menuconfig LIBMETAL
-	bool "libmetal Support"
-	help
-	  This option enables the libmetal HAL abstraction layer
-
-if LIBMETAL
-
-config LIBMETAL_SRC_PATH
-	string "libmetal library source path"
-	default "libmetal"
-	help
-	  This option specifies the path to the source for the libmetal library
-
-endif # LIBMETAL

zephyr/module.yml

@@ -1,3 +1,2 @@
 build:
-  kconfig: Kconfig
   cmake: .