fix(vite-plugin): remove directoy check on route file

[lfantone]

This PR tries to solve this issue

What I did was to remove the check against the appDirectory, the change look safe on the test I run which is based in the reproduction case submitted in the issue. But I don't have the background to know if that check is really needed.
Let me know and I can update the PR 😄

[changeset-bot]

🦋 Changeset detected

Latest commit: 6ac8b16

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 16 packages

Name	Type
@remix-run/dev	Patch
create-remix	Patch
remix	Patch
@remix-run/architect	Patch
@remix-run/cloudflare	Patch
@remix-run/cloudflare-pages	Patch
@remix-run/cloudflare-workers	Patch
@remix-run/css-bundle	Patch
@remix-run/deno	Patch
@remix-run/eslint-config	Patch
@remix-run/express	Patch
@remix-run/node	Patch
@remix-run/react	Patch
@remix-run/serve	Patch
@remix-run/server-runtime	Patch
@remix-run/testing	Patch

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[jrestall]

Nice this would also fix #6711 (comment)

[pcattori]

Superceded by #8795

Thanks @lfantone for filing the issue and putting up a PR! 🙏 We want this bug fix to land in time for out 2.7 release and rebasing PRs onto the release branch via GitHub UI is messy... So instead, I recreated this PR in #8795 and tagged you as a co-author in that commit.