Remove `Symbol.dispose` integration in `setTimeout` and `setInterval`

As part of the [Symbol.dispose] integration, the Timeout return type of setTimeout and setInterval support disposing (https://github.com/nodejs/node/pull/48633). This was stabilized last week (https://github.com/nodejs/node/pull/58467).

I think this integration should be removed, as the web platform setTimeout / setInterval do not support Symbol.dispose and never can, because it returns a number.

This means that folks may start writing new code that is incompatible between browser and Node, just because they use the Symbol.dispose integration here. That would be unfortunate.

It would also cause one more incompatibility between server side platforms with web setTimeout, and Node setTimeout (e.g Cloudflare Workers) (cc @jasnell).

@mcollina said in person that this was made stable recently enough to still remove it.

首先检查 setTimeout 和 setInterval 入口点，以及 PR 48633 和 58467 中关联的更改。确认 Timeout 当前如何公开 Symbol.dispose，并确定浏览器计时器的兼容性要求；完成的标准是移除该集成，同时保留现有的计时器行为。