Revert "Debug info: Ensure that the last stop point in a function is still within"

This reverts commit r198461.

llvm-svn: 198714
diff --git a/clang/lib/CodeGen/CodeGenFunction.h b/clang/lib/CodeGen/CodeGenFunction.h
index c11f2c9..37bbcf3 100644
--- a/clang/lib/CodeGen/CodeGenFunction.h
+++ b/clang/lib/CodeGen/CodeGenFunction.h
@@ -877,7 +877,7 @@
   unsigned NumSimpleReturnExprs;
 
   /// The last regular (non-return) debug location (breakpoint) in the function.
-  std::pair<SourceLocation, llvm::MDNode*> LastStopPoint;
+  SourceLocation LastStopPoint;
 
 public:
   /// A scope within which we are constructing the fields of an object which