rebase to 0.18.3.3 completed

contrib/epee/include/hex.h

@@ -1,4 +1,4 @@
-// Copyright (c) 2017-2023, The Monero Project
+// Copyright (c) 2017-2022, The Monero Project
 //
 // All rights reserved.
 //
@@ -67,9 +67,6 @@ namespace epee
       return out;
     }
 
-    //! Write `src` as hex to `out`. `out` must be exactly 2x in size.
-    static bool buffer(span<char> out, const span<const std::uint8_t> src) noexcept;
-
     //! Append `src` as hex to `out`.
     static void buffer(std::ostream& out, const span<const std::uint8_t> src);