Remove unnecessary type cast

`npx tsc` output is the same before and after the changes.

src/ol/renderer/canvas/VectorLayer.js

@@ -196,7 +196,7 @@ class CanvasVectorLayerRenderer extends CanvasLayerRenderer {
     } else {
       const resolution = frameState.viewState.resolution;
       const rotation = frameState.viewState.rotation;
-      const layer = /** @type {import("../../layer/Vector.js").default} */ (this.getLayer());
+      const layer = this.getLayer();
       /** @type {!Object<string, boolean>} */
       const features = {};
       const result = this.replayGroup_.forEachFeatureAtCoordinate(coordinate, resolution, rotation, hitTolerance, {},