Function cleanup

src/splat/gaussianCloudLoader.ts:235–239

()

  return new Promise((resolve, reject) => {
    let settled = false;
    const cleanup = () => {
      worker.onmessage = null;
      worker.onerror = null;
      worker.terminate();
    };
    const settle = (callback: () => void) => {
      if (settled) return;
      settled = true;