Remove ISO build tooling (deferred to later)

Makefile

@@ -7,11 +7,10 @@ SHELL := sh
 KAMA ?= ../kama
 PKGS ?= ../kama-packages
 
-.PHONY: iso install recipe-check clean
+.PHONY: rootfs install recipe-check clean
 
-iso:
+rootfs:
 	sh scripts/build-root.sh
-	sh iso/build-iso.sh
 
 install:
 	sh installer/install.sh
@@ -22,4 +21,4 @@ recipe-check:
 	done
 
 clean:
-	rm -rf iso/work /tmp/keru
+	rm -rf /tmp/keru