Remove 'check-dg', a wrapper around 'check-local-dg' which was just
nuked.

Add a comment that the 'check-lit' rule is really just a legacy of
having two test runners.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@159310 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/projects/sample/Makefile.llvm.rules b/projects/sample/Makefile.llvm.rules
index c980d6b..a655302 100644
--- a/projects/sample/Makefile.llvm.rules
+++ b/projects/sample/Makefile.llvm.rules
@@ -1866,20 +1866,9 @@
 	  $(EchoCmd) No test directory ; \
 	fi
 
+# An alias dating from when both lit and DejaGNU test runners were used.
 check-lit:: check
 
-check-dg::
-	$(Verb) if test -d "$(PROJ_OBJ_ROOT)/test" ; then \
-	  if test -f "$(PROJ_OBJ_ROOT)/test/Makefile" ; then \
-	    $(EchoCmd) Running test suite ; \
-	    $(MAKE) -C $(PROJ_OBJ_ROOT)/test check-local-dg ; \
-	  else \
-	    $(EchoCmd) No Makefile in test directory ; \
-	  fi ; \
-	else \
-	  $(EchoCmd) No test directory ; \
-	fi
-
 check-all::
 	$(Verb) if test -d "$(PROJ_OBJ_ROOT)/test" ; then \
 	  if test -f "$(PROJ_OBJ_ROOT)/test/Makefile" ; then \