Remove ../vite/packages/vite from pnpm-workspace

It wasn't necessary, and this makes the pnpm-lock.yaml file smaller.

What _is_ necessary is to install using:

```sh
pnpm i --ignore-scripts
```

This is after doing this in each of ../vite and ../vitest to change the
version:

```sh
git reset --hard <tag or commit>
rm -rf node_modules packages/*/node_modules
pnpm i --ignore-scripts --frozen-lockfile
pnpm build
```