diff --git a/exec/GNUmakefile b/exec/GNUmakefile
index 4b82a81bf8c0ac5db701421aa8b1ba68bbdcae6c..6c6125ef1fccc7432b9fabdd45e7b32b24e6bb85 100644
--- a/exec/GNUmakefile
+++ b/exec/GNUmakefile
@@ -44,14 +44,3 @@ all : 	bullseye.bin \
 
 %.bin : %.src $(BAJAPATH)
 	@$(BAJAPATH) /q $<
-
-devel : tags cscope.out
-
-tags: cscope.files
-	exctags -VL cscope.files
-
-cscope.out: cscope.files
-	cscope -b
-
-cscope.files::
-	find . -name '*.js' > cscope.files