message_engine: remove check which blocks send

When experiencing connectivity changes, a users registration
state might be ERROR_NETWORK, which would cause the message
not to send. This caused an issue with usage of jami over
a local network. If a device would disconnect from wifi/eth,
the various channels they had open with other local users
would keep alive but messages could not be sent.

Change-Id: Id3219fce31545b8102e9589b82aad32968d50f64

src/im/message_engine.cpp

@@ -86,8 +86,6 @@ MessageEngine::onPeerOnline(const std::string& peer,
 void
 MessageEngine::retrySend(const std::string& peer, const std::string& deviceId, bool retryOnTimeout)
 {
-    if (account_.getRegistrationState() != RegistrationState::REGISTERED)
-        return;
     struct PendingMsg {
         MessageToken token;
         std::string to;