Remove unused variable spotted by GCC.

Devang, can we remove this call entirely? If I try that, "make check" passes
but the call has a side-effect of ensuring that the block's context exists in
the debug info. getContextDescriptor() is used in a void context for that side-
effect elsewhere in this file. Please take a look!


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@130679 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/CGDebugInfo.cpp b/lib/CodeGen/CGDebugInfo.cpp
index 87b02ac..6ce49b5 100644
--- a/lib/CodeGen/CGDebugInfo.cpp
+++ b/lib/CodeGen/CGDebugInfo.cpp
@@ -2082,8 +2082,7 @@
   unsigned column = getColumnNumber(loc);
   
   // Build the debug-info type for the block literal.
-  llvm::DIDescriptor enclosingContext =  
-    getContextDescriptor(cast<Decl>(blockDecl->getDeclContext()));
+  getContextDescriptor(cast<Decl>(blockDecl->getDeclContext()));
 
   const llvm::StructLayout *blockLayout =
     CGM.getTargetData().getStructLayout(block.StructureType);