connection: Remove unused timeout feature

Was only used for a unit test and incorrectly at that.

src/network/connection.h

@@ -48,7 +48,6 @@ class IConnection
 public:
 	virtual ~IConnection() = default;
 
-	virtual void SetTimeoutMs(u32 timeout) = 0;
 	virtual void Serve(Address bind_addr) = 0;
 	virtual void Connect(Address address) = 0;
 	virtual bool Connected() = 0;
@@ -56,7 +55,6 @@ public:
 	virtual void DisconnectPeer(session_t peer_id) = 0;
 
 	virtual bool ReceiveTimeoutMs(NetworkPacket *pkt, u32 timeout_ms) = 0;
-	virtual void Receive(NetworkPacket *pkt) = 0;
 	bool TryReceive(NetworkPacket *pkt) {
 		return ReceiveTimeoutMs(pkt, 0);
 	}

src/network/mtp/impl.cpp

@@ -1486,13 +1486,6 @@ bool Connection::ReceiveTimeoutMs(NetworkPacket *pkt, u32 timeout_ms)
 	return false;
 }
 
-void Connection::Receive(NetworkPacket *pkt)
-{
-	bool any = ReceiveTimeoutMs(pkt, m_bc_receive_timeout);
-	if (!any)
-		throw NoIncomingDataException("No incoming data");
-}
-
 void Connection::Send(session_t peer_id, u8 channelnum,
 		NetworkPacket *pkt, bool reliable)
 {

src/network/mtp/impl.h

@@ -249,13 +249,11 @@ public:
 
 	void putCommand(ConnectionCommandPtr c);
 
-	void SetTimeoutMs(u32 timeout) { m_bc_receive_timeout = timeout; }
 	void Serve(Address bind_addr);
 	void Connect(Address address);
 	bool Connected();
 	void Disconnect();
 	bool ReceiveTimeoutMs(NetworkPacket *pkt, u32 timeout_ms);
-	void Receive(NetworkPacket *pkt);
 	void Send(session_t peer_id, u8 channelnum, NetworkPacket *pkt, bool reliable);
 	session_t GetPeerID() const { return m_peer_id; }
 	Address GetPeerAddress(session_t peer_id);
@@ -317,7 +315,6 @@ private:
 
 	// Backwards compatibility
 	PeerHandler *m_bc_peerhandler;
-	u32 m_bc_receive_timeout = 0;
 
 	bool m_shutting_down = false;
 };

src/network/networkexceptions.h

@@ -51,12 +51,6 @@ public:
 	InvalidIncomingDataException(const char *s) : BaseException(s) {}
 };
 
-class NoIncomingDataException : public BaseException
-{
-public:
-	NoIncomingDataException(const char *s) : BaseException(s) {}
-};
-
 }
 
 class SocketException : public BaseException