packaging: Do not unset env vars needed for CC

SKOPEO, UMOCI, and AA_KBC have been unset so far as we have not been
generating rootfs images that would be used for CC as part of our
workflow.

Now, as we're targetting the first release of the operator with the CCv0
branch, let's stop unsetting those and start taking advantage of our
tools to help us building a CC capable image.

Signed-off-by: Fabiano Fidêncio <fabiano.fidencio@intel.com>

tools/packaging/guest-image/build_image.sh

@@ -48,10 +48,6 @@ build_image() {
 	info "Build image"
 	info "image os: $img_distro"
 	info "image os version: $img_os_version"
-	# CCv0 on image is currently unsupported, do not pass
-	unset SKOPEO
-	unset UMOCI
-	unset AA_KBC
 	sudo -E PATH="${PATH}" make image \
 		DISTRO="${img_distro}" \
 		DEBUG="${DEBUG:-}" \