message: log: try without using for enum
diff: @@ -8,8 +8,6 @@ namespace mavsdk::log {
  // defined numeric values can be useful for filtering message by severity
  enum class Level : int { Debug = 0, Info = 1, Warn = 2, Err = 3 };
  -using Level = enum Level;
  -
  /** @brief User-defined callback for logging. Returning true from this callback
  * prevents default mavsdk`s logging to stdout. Returning false keeps it.
  */
  