Remove unused lambda capture variables

This removes two compile time warnings.

src/neochatroom.cpp

@@ -149,7 +149,7 @@ NeoChatRoom::NeoChatRoom(Connection *connection, QString roomId, JoinState joinS
 
             if (NeoChatConfig::rejectUnknownInvites()) {
                 auto job = this->connection()->callApi<NeochatGetCommonRoomsJob>(roomMemberEvent->senderId());
-                connect(job, &BaseJob::result, this, [this, job, roomMemberEvent, showNotification] {
+                connect(job, &BaseJob::result, this, [this, job, showNotification] {
                     QJsonObject replyData = job->jsonData();
                     if (replyData.contains(QStringLiteral("joined"))) {
                         const bool inAnyOfOurRooms = !replyData[QStringLiteral("joined")].toArray().isEmpty();

src/roommanager.cpp

@@ -375,7 +375,7 @@ void RoomManager::knockRoom(NeoChatConnection *account, const QString &roomAlias
                     account,
                     &NeoChatConnection::newRoom,
                     this,
-                    [this](Quotient::Room *room) {
+                    [](Quotient::Room *room) {
                         Q_EMIT Controller::instance().showMessage(Controller::Info, i18n("You requested to join '%1'", room -> name()));
                     },
                     Qt::SingleShotConnection);