initramfs-ostree-image: drop qemuboot from IMAGE_CLASSES
To avoid generating a qemuboot.conf for qemu machines, it's useless for
a initramfs image.
@@ -13,7 +13,7 @@ IMAGE_LINGUAS = ""
LICENSE = "MIT"
-IMAGE_CLASSES_remove = "image_repo_manifest"
+IMAGE_CLASSES_remove = "image_repo_manifest qemuboot"
IMAGE_FSTYPES = "${INITRAMFS_FSTYPES}"
