static filterObservedResults(images, interactiveTimestamp) {
    return images.filter(image => {
      if (image.wastedBytes < IGNORE_THRESHOLD_IN_BYTES) return false;
      if (image.wastedPercent < IGNORE_THRESHOLD_IN_PERCENT) return false;
      return image.requestStartTime < interactiveTimestamp / 1000 - IGNORE_THRESHOLD_IN_MS;
    });
  }
Filters out image requests that were requested after TTI.

@param {WasteResult[]} images
@param {number} interactiveTimestamp