remove utility methods that are not very useful.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@74762 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Analysis/RegionStore.cpp b/lib/Analysis/RegionStore.cpp
index 288831c..23e8b738 100644
--- a/lib/Analysis/RegionStore.cpp
+++ b/lib/Analysis/RegionStore.cpp
@@ -937,7 +937,7 @@
   // Check if the super region has a binding.
   if (B.lookup(superR)) {
     // We do not extract the bit value from super region for now.
-    return ValMgr.makeUnknownVal();
+    return UnknownVal();
   }
   
   if (R->hasHeapStorage()) {