Remove fill-color when creating tiles to avoid red/green flashes

public/map/js/functions_mapbox.js

@@ -339,7 +339,7 @@ const mapboxLayer = (monthYear) => {
         minzoom: 5,
         'paint': {
             'fill-opacity': 0,
-            'fill-color': [
+            /*'fill-color': [
                 'interpolate',
                 ['linear'],
                 ['get', 'df'],