Makefile: remove circular dependency created by robo-changing UTILITIES->utils

* targets.mk: Remove circular dependency created by robo-changing
  UTILITIES->utils.

Fortunately this was non-fatal since direct circular dependencies are
ignored by GNU Make.  Must happen more often... :-)

targets.mk

@@ -146,8 +146,6 @@ cleanaddcontrib:
 	$(RM) $(ORG_TO_LISP)
 endif
 
-cleanutils:	cleanutils
-
 cleanelc:
 	$(MAKE) -C lisp $@