1 files changed, 2 insertions, 9 deletions
diff --git a/dep/utf8cpp/utf8/cpp17.h b/dep/utf8cpp/utf8/cpp17.h
index 32a77ce3075..075873003ef 100644
--- a/dep/utf8cpp/utf8/cpp17.h
+++ b/dep/utf8cpp/utf8/cpp17.h
@@ -28,17 +28,10 @@ DEALINGS IN THE SOFTWARE.
 #ifndef UTF8_FOR_CPP_7e906c01_03a3_4daf_b420_ea7ea952b3c9
 #define UTF8_FOR_CPP_7e906c01_03a3_4daf_b420_ea7ea952b3c9
 
-#include "checked.h"
-#include <string>
+#include "cpp11.h"
 
 namespace utf8
 {
-
-    inline void append(char32_t cp, std::string& s)
-    {
-        append(uint32_t(cp), std::back_inserter(s));
-    }
-
     inline std::string utf16to8(std::u16string_view s)
     {
         std::string result;
@@ -96,7 +89,7 @@ namespace utf8
     {
         return starts_with_bom(s.begin(), s.end());
     }
- 
+
 } // namespace utf8
 
 #endif // header guard