refactor: alte lokale States und ungenutzte Funktionen entfernt

- lineStatusData und setLinesData entfernt (durch Redux ersetzt)
- doppeltes fetchGisStationsMeasurementsThunk entfernt
- Kommentar-Altlasten bereinigt
- Vorbereitung für künftige Migration von lineColors zu Redux

components/mainComponent/MapComponent.js

@@ -142,10 +142,9 @@ const MapComponent = ({ locations, onLocationUpdate, lineCoordinates }) => {
   const [sonstigeMarkers, setSonstigeMarkers] = useState([]);
   const [tkComponentsMarkers, setTkComponentsMarkers] = useState([]);
   //--------------------------------------------
-  const [lineStatusData, setLineStatusData] = useState([]);
 
   const [linePositions, setLinePositions] = useState([]);
-  const { lineColors, tooltipContents } = useLineData(webserviceGisLinesStatusUrl, setLineStatusData);
+  const { lineColors, tooltipContents } = useLineData(webserviceGisLinesStatusUrl);
   const [polylines, setPolylines] = useState([]);
   const [markers, setMarkers] = useState([]);
   const [newPoint, setNewPoint] = useState(null);
@@ -784,7 +783,6 @@ const MapComponent = ({ locations, onLocationUpdate, lineCoordinates }) => {
       );
     }
   }, [map, menuItemAdded]);
-  //--------------------------------------------
 
   //--------------------------------------------
   //  Beim ersten Client-Render den Wert aus localStorage laden
@@ -793,11 +791,6 @@ const MapComponent = ({ locations, onLocationUpdate, lineCoordinates }) => {
     dispatch(setPolylineVisible(storedPolylineVisible));
   }, [dispatch]);
   //--------------------------------------------
-  useEffect(() => {
-    if (statusMeasurements === "idle") {
-      dispatch(fetchGisStationsMeasurementsThunk());
-    }
-  }, [statusMeasurements, dispatch]);
 
   useEffect(() => {
     if (statusSystem === "idle") {
@@ -824,8 +817,10 @@ const MapComponent = ({ locations, onLocationUpdate, lineCoordinates }) => {
     }
   }, [statusStaticDistrict, dispatch]);
   useEffect(() => {
-    dispatch(fetchGisStationsMeasurementsThunk());
-  }, [dispatch]);
+    if (statusMeasurements === "idle") {
+      dispatch(fetchGisStationsMeasurementsThunk());
+    }
+  }, [statusMeasurements, dispatch]);
   useEffect(() => {
     dispatch(fetchGisSystemStaticThunk());
   }, [dispatch]);