x86: remove obsolete Config.in file

Signed-off-by: Felix Fietkau <nbd@nbd.name>

target/linux/x86/image/Config.in

@@ -1,14 +0,0 @@
-config X86_ETHERBOOT_IMAGES
-	bool "Build Etherboot image"
-	depends on TARGET_x86_thincan_DBE61
-	default y
-	help
-	  Builds network bootable image for ThinCan DBE61 (Etherboot BIOS)
-
-config X86_ETHERBOOT_BOOTOPTS
-	string "Extra kernel boot options"
-	depends on X86_ETHERBOOT_IMAGES
-	default "ip=dhcp nbdport=2000 " if TARGET_ROOTFS_SQUASHFS
-	default "ip=dhcp root=/dev/nfs nfsroot=192.168.0.1:/srv/dbe61"
-	help
-	  Kernel arguments to pass to the kernel eg. NFS root location etc.