message: remove unused type in hooks
diff: @@ -29,7 +29,6 @@ type DocumentPreParallelFn<T> = (this: TypegooseDoc<T>, next: HookNextFn, done:
  type SimplePreSerialFn<T> = (next: HookNextFn, docs?: any[]) => void;
  type SimplePreParallelFn<T> = (next: HookNextFn, done: PreDoneFn) => void;
  -type DocumentPostFn<T> = (this: TypegooseDoc<T>, doc: TypegooseDoc<T>, next?: HookNextFn) => void;
  type ModelPostFn<T> = (result: any, next?: HookNextFn) => void;
  type PostNumberResponse<T> = (result: number, next?: HookNextFn) => void;
  