Remove unused signal

src/controller.cpp

@@ -163,8 +163,6 @@ void Controller::addConnection(NeoChatConnection *c)
     c->setLazyLoading(true);
 
     connect(c, &NeoChatConnection::syncDone, this, [this, c] {
-        Q_EMIT syncDone();
-
         c->sync(30000);
         c->saveState();
     });

src/controller.h

@@ -141,7 +141,6 @@ private Q_SLOTS:
 
 Q_SIGNALS:
     void errorOccured(const QString &error, const QString &detail);
-    void syncDone();
     void connectionAdded(NeoChatConnection *connection);
     void connectionDropped(NeoChatConnection *connection);
     void initiated();