6104 remove obsolete env files

@@ -20,12 +20,10 @@
 #
 # Copyright (c) 1999, 2010, Oracle and/or its affiliates. All rights reserved.
 #
 
 ENVFILES= \
-        developer \
-        gatekeeper \
         illumos
 
 include ../Makefile.tools
 
 FILEMODE= 644