Cleanup usages of _LIBCPP_HAS_NO_<c++11-feature> in <bitset>, <ios>, <locale>, and <iterator>

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@300648 91177308-0d34-0410-b5e6-96231b3b80d8
4 files changed