Only use Canvas for routing segments

Routing trailers are lagging behind and Canvas by default might have side effects (Plugins)

js/plugin/Routing.js

@@ -51,7 +51,6 @@ BR.Routing = L.Routing.extend({
 
         this._segmentsCasing = new L.FeatureGroup().addTo(map);
         this._loadingTrailerGroup = new L.FeatureGroup().addTo(map);
-        this._loadingTrailerRenderer = L.svg(); // CSS animation based on SVG path element
 
         var container = L.Routing.prototype.onAdd.call(this, map);
 
@@ -389,7 +388,6 @@ BR.Routing = L.Routing.extend({
                 opacity: this.options.styles.trailer.opacity,
                 dashArray: [10, 10],
                 className: 'loading-trailer',
-                renderer: this._loadingTrailerRenderer,
             });
             this._loadingTrailerGroup.addLayer(loadingTrailer);
         }