dht: remove deprecated constructor

include/opendht/dht.h

@@ -67,9 +67,6 @@ public:
      */
     Dht(std::unique_ptr<net::DatagramSocket>&& sock, const Config& config, const Sp<Logger>& l = {});
 
-    Dht(std::unique_ptr<net::DatagramSocket>&& sock, const Config& config, const Logger& l = {})
-        : Dht(std::move(sock), config, std::make_shared<Logger>(l)) {}
-
     virtual ~Dht();
 
     /**

include/opendht/logger.h

@@ -41,9 +41,9 @@ struct Logger {
     LogMethodFmt logger = {};
     LogMethodPrintf loggerf = {};
 
-    Logger() = default;
-    Logger(LogMethodFmt&& logger, LogMethodPrintf&& loggerf)
-        : logger(std::move(logger)), loggerf(std::move(loggerf)) {
+    Logger() = delete;
+    Logger(LogMethodFmt&& l, LogMethodPrintf&& lf)
+        : logger(std::move(l)), loggerf(std::move(lf)) {
             if (!logger or !loggerf)
                 throw std::invalid_argument{"logger and loggerf must be set"};
         }