[ranges.syn] Remove redundant freestanding mark for members

Author: frederick-vs-ja

source/ranges.tex

@@ -552,19 +552,19 @@
     : integral_constant<size_t, 2> {};
   template<class I, class S, ranges::subrange_kind K>
   struct tuple_element<0, ranges::subrange<I, S, K>> {                              // freestanding
-    using type = I;                                                                 // freestanding
+    using type = I;
   };
   template<class I, class S, ranges::subrange_kind K>
   struct tuple_element<1, ranges::subrange<I, S, K>> {                              // freestanding
-    using type = S;                                                                 // freestanding
+    using type = S;
   };
   template<class I, class S, ranges::subrange_kind K>
   struct tuple_element<0, const ranges::subrange<I, S, K>> {                        // freestanding
-    using type = I;                                                                 // freestanding
+    using type = I;
   };
   template<class I, class S, ranges::subrange_kind K>
   struct tuple_element<1, const ranges::subrange<I, S, K>> {                        // freestanding
-    using type = S;                                                                 // freestanding
+    using type = S;
   };
 
   struct from_range_t { explicit from_range_t() = default; };                       // freestanding