Remove old-space-size filtering from dev server (#49727)
We shouldn't filter this from the router worker as this is where the dev
server runs and should be able to allocate more memory.
x-ref: [slack
thread](https://vercel.slack.com/archives/C04MEB9L9RQ/p1683823794069839?thread_ts=1683756338.246099&cid=C04MEB9L9RQ)
