chore: remove unused polyfills module

[Nic-Polumeyv]

leftover from #15430

---

Please don't delete this checklist! Before submitting the PR, please make sure you do the following:

• It's really useful if your PR references an issue where it is discussed ahead of time. In many cases, features are absent for a reason. For large changes, please create an RFC: https://github.com/sveltejs/rfcs
• This message body should clearly illustrate what problems it solves.
• Ideally, include a test that fails without this PR but passes with it.

Tests

• Run the tests with pnpm test and lint the project with pnpm lint and pnpm check

Changesets

• If your PR makes a change that should be noted in one or more packages' changelogs, generate a changeset by running pnpm changeset and following the prompts. Changesets that add features should be minor and those that fix bugs should be patch. Please prefix changeset messages with feat:, fix:, or chore:.

Edits

• Please ensure that 'Allow edits from maintainers' is checked. PRs without this option may be closed.

[pkg-svelte-dev]

Install the latest version of @sveltejs/kit from 3042beb:

pnpm add https://pkg.svelte.dev/@sveltejs/kit/c/3042beb9e42c5c68570f78e669e4e2a07e7e009f

Open in pkg.svelte.dev: https://pkg.svelte.dev/repos/kit/pr/16613

Note

This PR is from a fork. A maintainer must approve approve each commit before it can be built and installed.

[changeset-bot]

⚠️ No Changeset found

Latest commit: 3042beb

Merging this PR will not cause a version bump for any packages. If these changes should not result in a new version, you're good to go. If these changes should result in a version bump, you need to add a changeset.

This PR includes no changesets

When changesets are added to this PR, you'll see the packages that this PR includes changesets for and the associated semver types

Click here to learn what changesets are, and how to add one.

Click here if you're a maintainer who wants to add a changeset to this PR

[teemingc]

Thanks! I removed the changeset since we don't add that if it's a non user-facing change (docs, removing something that doesn't change how a user develops, etc.)

[svelte-docs-bot]

Preview: https://svelte-dev-git-preview-kit-16613-svelte.vercel.app/