Don't resize/clear the vector renderer canvas

Already done in the `renderFrame` function

src/ol/renderer/canvas/VectorImageLayer.js

@@ -82,8 +82,6 @@ class CanvasVectorImageLayerRenderer extends CanvasImageLayerRenderer {
         if (vectorRenderer.prepareFrame(imageFrameState, layerState) &&
               (vectorRenderer.replayGroupChanged ||
               !equals(skippedFeatures, newSkippedFeatures))) {
-          context.canvas.width = imageFrameState.size[0] * pixelRatio;
-          context.canvas.height = imageFrameState.size[1] * pixelRatio;
           vectorRenderer.renderFrame(imageFrameState, layerState);
           skippedFeatures = newSkippedFeatures;
           callback();