Remove unused variable.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@158353 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/CGDebugInfo.cpp b/lib/CodeGen/CGDebugInfo.cpp
index 534a315..2deff03 100644
--- a/lib/CodeGen/CGDebugInfo.cpp
+++ b/lib/CodeGen/CGDebugInfo.cpp
@@ -1565,7 +1565,6 @@
 
 /// CreateEnumType - get enumeration type.
 llvm::DIType CGDebugInfo::CreateEnumType(const EnumDecl *ED) {
-  llvm::DIFile Unit = getOrCreateFile(ED->getLocation());
   SmallVector<llvm::Value *, 16> Enumerators;
 
   // Create DIEnumerator elements for each enumerator.