[libc++] Unconditionally enable the __pad_and_output optimization

This used to be guarded on whether the deployment target was greater
than macosx10.8, however testing against the dylibs for 10.8 and earlier
with the function enabled works too. The revision that introduced
__pad_and_output is r164241 and it does not mention a reason for the
guard.

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@358677 91177308-0d34-0410-b5e6-96231b3b80d8

include/iterator

@@ -1090,10 +1090,6 @@ public:
     _LIBCPP_INLINE_VISIBILITY ostreambuf_iterator& operator++(int) {return *this;}
     _LIBCPP_INLINE_VISIBILITY bool failed() const _NOEXCEPT {return __sbuf_ == 0;}
 
-#if !defined(__APPLE__) || \
-    (defined(__MAC_OS_X_VERSION_MIN_REQUIRED) && __MAC_OS_X_VERSION_MIN_REQUIRED > __MAC_10_8) || \
-    (defined(__IPHONE_OS_VERSION_MIN_REQUIRED) && __IPHONE_OS_VERSION_MIN_REQUIRED > __IPHONE_6_0)
-
     template <class _Ch, class _Tr>
     friend
     _LIBCPP_HIDDEN
@@ -1101,7 +1097,6 @@ public:
     __pad_and_output(ostreambuf_iterator<_Ch, _Tr> __s,
                      const _Ch* __ob, const _Ch* __op, const _Ch* __oe,
                      ios_base& __iob, _Ch __fl);
-#endif
 };
 
 template <class _Iter>

include/locale

@@ -1372,10 +1372,6 @@ __pad_and_output(_OutputIterator __s,
     return __s;
 }
 
-#if !defined(__APPLE__) || \
-    (defined(__MAC_OS_X_VERSION_MIN_REQUIRED) && __MAC_OS_X_VERSION_MIN_REQUIRED > __MAC_10_8) || \
-    (defined(__IPHONE_OS_VERSION_MIN_REQUIRED) && __IPHONE_OS_VERSION_MIN_REQUIRED > __IPHONE_6_0)
-
 template <class _CharT, class _Traits>
 _LIBCPP_HIDDEN
 ostreambuf_iterator<_CharT, _Traits>
@@ -1422,8 +1418,6 @@ __pad_and_output(ostreambuf_iterator<_CharT, _Traits> __s,
     return __s;
 }
 
-#endif
-
 template <class _CharT, class _OutputIterator>
 _OutputIterator
 num_put<_CharT, _OutputIterator>::do_put(iter_type __s, ios_base& __iob,