fix: always unsubscribe on sources

sources/awesome-widget/plugin/awdataengineaggregator.cpp

@@ -99,11 +99,10 @@ void AWDataEngineAggregator::dropSource(const QString &_source)
 {
     qCDebug(LOG_AW) << "Disconnect sensor" << _source;
 
-    if (m_subscribed.contains(_source)) {
+    m_interface->unsubscribe({_source}).waitForFinished();
     m_interface->unsubscribe({_source}).waitForFinished();
     m_subscribed.remove(_source);
 }
-}
 
 
 void AWDataEngineAggregator::sensorAdded(const QString &_sensor)