[libc++][NFC] Remove redundant defined(_LIBCPP_BUILDING_LIBRARY)

diff --git a/libcxx/include/string b/libcxx/include/string
index d444250..eeff013 100644 (file)
--- a/libcxx/include/string
+++ b/libcxx/include/string
@@ -1557,7 +1557,7 @@ public:
     const value_type* c_str() const _NOEXCEPT {return data();}
     _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20
     const value_type* data() const _NOEXCEPT  {return std::__to_address(__get_pointer());}
-#if _LIBCPP_STD_VER >= 17 || defined(_LIBCPP_BUILDING_LIBRARY)
+#if _LIBCPP_STD_VER >= 17
     _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20
     value_type* data()             _NOEXCEPT  {return std::__to_address(__get_pointer());}
 #endif