Remove directboot.

osbuild-manifests/Makefile

@@ -38,7 +38,7 @@ EXTRA_MPP_ARGS +=-D ostree_parent_refs='$(shell tools/ot-refs $(OSTREE_REPO))'
 endif
 
 export CHECKPOINTS=build
-IMAGETYPES := regular ostree direct
+IMAGETYPES := regular ostree
 FORMATS := img qcow2 oci.tar repo rootfs ext4 tar
 COMMON_TARGETS := qemu
 HOST_TARGETS := $(COMMON_TARGETS) $($(HOST_ARCH)_TARGETS)
@@ -52,7 +52,6 @@ image-name = $(call image-name-noarch,$1,$2,$3,$4).$5
 # variable name for image type
 regular_IMAGETYPE := regular
 ostree_IMAGETYPE := ostree
-direct_IMAGETYPE := directboot
 
 help:
 	@echo