{fs/,package/gen}romfs: remove

Fixes:
http://autobuild.buildroot.net/results/9b0/9b09c8681e1003580b766aa0d244889f3b0be0c8/

Romfs is very old and limited, the fs logic and package has not really
changed since it was added 17 years ago with Commit 4b01dfced9 ("Add romfs
target support, courtesy Josh <buildroot@digitalpeer.com>") and genromfs
crashes in some situations, so drop it.

Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
[Arnout: also remove from DEVELOPERS]
Signed-off-by: Arnout Vandecappelle <arnout@mind.be>

fs/Config.in

@@ -12,7 +12,6 @@ source "fs/initramfs/Config.in"
 source "fs/iso9660/Config.in"
 source "fs/jffs2/Config.in"
 source "fs/oci/Config.in"
-source "fs/romfs/Config.in"
 source "fs/squashfs/Config.in"
 source "fs/tar/Config.in"
 source "fs/ubi/Config.in"

fs/romfs/Config.in

@@ -1,4 +0,0 @@
-config BR2_TARGET_ROOTFS_ROMFS
-	bool "romfs root filesystem"
-	help
-	  Build a romfs image of the root filesystem.

fs/romfs/romfs.mk

@@ -1,13 +0,0 @@
-################################################################################
-#
-# Build the romfs root filesystem image
-#
-################################################################################
-
-ROOTFS_ROMFS_DEPENDENCIES = host-genromfs
-
-define ROOTFS_ROMFS_CMD
-	$(HOST_DIR)/bin/genromfs -d $(TARGET_DIR) -f $@
-endef
-
-$(eval $(rootfs))