Remove unused and undesirable reference from BindingDecl to DecompositionDecl.

llvm-svn: 278448
diff --git a/clang/lib/Sema/SemaDeclCXX.cpp b/clang/lib/Sema/SemaDeclCXX.cpp
index cecbee1..a1ef6b4 100644
--- a/clang/lib/Sema/SemaDeclCXX.cpp
+++ b/clang/lib/Sema/SemaDeclCXX.cpp
@@ -791,7 +791,7 @@
       Diag(Old->getLocation(), diag::note_previous_definition);
     }
 
-    auto *BD = BindingDecl::Create(Context, DC, nullptr, B.NameLoc, B.Name);
+    auto *BD = BindingDecl::Create(Context, DC, B.NameLoc, B.Name);
     PushOnScopeChains(BD, S, true);
     Bindings.push_back(BD);
     ParsingInitForAutoVars.insert(BD);