Remove the PaddingFields member from CGRecordLayout, it wasn't used anyway.

llvm-svn: 79799
diff --git a/clang/lib/CodeGen/CGRecordLayoutBuilder.cpp b/clang/lib/CodeGen/CGRecordLayoutBuilder.cpp
index 508a997..0dc64f0 100644
--- a/clang/lib/CodeGen/CGRecordLayoutBuilder.cpp
+++ b/clang/lib/CodeGen/CGRecordLayoutBuilder.cpp
@@ -330,5 +330,5 @@
     Types.addBitFieldInfo(Info.FD, Info.FieldNo, Info.Start, Info.Size);
   }
   
-  return new CGRecordLayout(Ty, llvm::SmallSet<unsigned, 8>());
+  return new CGRecordLayout(Ty);
 }