revert r88963.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@88965 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/CGDebugInfo.cpp b/lib/CodeGen/CGDebugInfo.cpp
index 6141800..41ffddd 100644
--- a/lib/CodeGen/CGDebugInfo.cpp
+++ b/lib/CodeGen/CGDebugInfo.cpp
@@ -493,7 +493,6 @@
   llvm::TrackingVH<llvm::MDNode> FwdDeclNode = FwdDecl.getNode();
   // Otherwise, insert it into the TypeCache so that recursive uses will find
   // it.
-  llvm::TrackingVH<llvm::MDNode> FwdDeclNode = FwdDecl.getNode();
   TypeCache[QualType(Ty, 0).getAsOpaquePtr()] = FwdDecl.getNode();
 
   // Convert all the elements.