Remove empty constructors and destructors from core/

core/io/dtls_server.h

@@ -49,6 +49,4 @@ public:
 	virtual Error setup(Ref<TLSOptions> p_options) = 0;
 	virtual void stop() = 0;
 	virtual Ref<PacketPeerDTLS> take_connection(Ref<PacketPeerUDP> p_peer) = 0;
-
-	DTLSServer() {}
 };