semodule-utils: remove semodule_deps

As discussed in https://github.com/SELinuxProject/selinux/issues/64,
semodule_deps has apparently been broken for a very long time for
binary modules and is completely irrelevant for CIL modules.  If there
are any users of it, they ought to be rewritten anyway since it is
not producing correct dependency information, and the ultimate goal
is to stop using binary modules altogether so it is not worth fixing.
Remove it to avoid any further broken usage.

Signed-off-by: Stephen Smalley <sds@tycho.nsa.gov>
diff --git a/semodule-utils/Makefile b/semodule-utils/Makefile
index 6bf4aee..e0a6579 100644
--- a/semodule-utils/Makefile
+++ b/semodule-utils/Makefile
@@ -1,4 +1,4 @@
-SUBDIRS = semodule_package semodule_link semodule_expand semodule_deps
+SUBDIRS = semodule_package semodule_link semodule_expand
 
 all install relabel clean indent:
 	@for subdir in $(SUBDIRS); do \