Revert "Merge to upstream r304942."

This reverts commit 83b1388ecd, reversing
changes made to f20819f925.

Test: treehugger
Bug: None

test/std/numerics/rand/rand.util/rand.util.seedseq/initializer_list.pass.cpp

@@ -7,8 +7,6 @@
 //
 //===----------------------------------------------------------------------===//
 
-// UNSUPPORTED: c++98, c++03
-
 // <random>
 
 // class seed_seq;
@@ -21,6 +19,7 @@
 
 int main()
 {
+#ifndef _LIBCPP_HAS_NO_GENERALIZED_INITIALIZERS
     std::seed_seq s= {5, 4, 3, 2, 1};
     assert(s.size() == 5);
     unsigned b[5] = {0};
@@ -30,4 +29,5 @@ int main()
     assert(b[2] == 3);
     assert(b[3] == 2);
     assert(b[4] == 1);
+#endif  // _LIBCPP_HAS_NO_GENERALIZED_INITIALIZERS
 }