Fix http://llvm.org/bugs/show_bug.cgi?id=11616

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@146881 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/include/utility b/include/utility
index 2efea28..7facea3 100644
--- a/include/utility
+++ b/include/utility
@@ -306,7 +306,7 @@
 
 
 
-    template <class... _Args1, class... _Args2, size_t... _I1, size_t... _I2>
+    template <class... _Args1, class... _Args2>
         _LIBCPP_INLINE_VISIBILITY
         pair(piecewise_construct_t __pc, tuple<_Args1...> __first_args,
                                     tuple<_Args2...> __second_args)