board/common/post-image: Remove hack for building sdcards images

Bootloaders is not built during normal build, not possible to create
sdcard images.

Author: mattiaswal

board/common/post-image.sh

@@ -110,11 +110,3 @@ if [ "$BR2_TARGET_ROOTFS_SQUASHFS" = "y" ]; then
     # Quick intro for beginners, with links to more information
     cp "$BR2_EXTERNAL_INFIX_PATH/board/common/README.txt" "$BINARIES_DIR/"
 fi
-
-boards=$(${BR2_EXTERNAL_INFIX_PATH}/board/common/selected-boards.sh ${BR2_EXTERNAL_INFIX_PATH} ${O})
-for board in $boards; do
-	[ ! -f "${BR2_EXTERNAL_INFIX_PATH}/src/board/${board}/post-image.sh" ] && continue
-	RELEASE=$(ver)
-	export INFIX_ID RELEASE
-	${BR2_EXTERNAL_INFIX_PATH}/src/board/${board}/post-image.sh
-done