Method removeCallback

frontend/src/services/uploadService.ts:99–106

(type: "start" | "end", callback: () => void)

  }

  removeCallback(type: "start" | "end", callback: () => void) {
    if (type == "start") {
      this.callbacks.onStart.delete(callback);
    }
    if (type == "end") {
      this.callbacks.onEnd.delete(callback);
    }
  }

  onStart() {
    this.callbacks.onStart.forEach((callback) => {