chore(ci): remove autofix.ci workflow (#470)

Removes the autofix.ci workflow.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

<!-- CURSOR_SUMMARY -->
---

> [!NOTE]
> **Low Risk**
> Low risk: deletes a standalone CI workflow with no runtime code
changes, but it will stop automatic fix commits on PRs and could
increase manual formatting churn.
> 
> **Overview**
> Removes the `.github/workflows/autofix.yml` GitHub Actions workflow
that previously ran on `pull_request`/`main` pushes to install deps,
build/package, and invoke `autofix-ci/action` to push automated fixes
back to branches.
> 
> <sup>Reviewed by [Cursor Bugbot](https://cursor.com/bugbot) for commit
1c2c416618. Bugbot is set up for automated
code reviews on this repo. Configure
[here](https://www.cursor.com/dashboard/bugbot).</sup>
<!-- /CURSOR_SUMMARY -->

.github/workflows/autofix.yml

@@ -1,29 +0,0 @@
-name: autofix.ci
-
-on:
-  pull_request:
-  push:
-    branches:
-      - main
-
-permissions:
-  contents: read
-
-jobs:
-  autofix:
-    runs-on: ubuntu-latest
-
-    steps:
-      - name: Checkout PR branch
-        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6
-
-      - uses: jdx/mise-action@1648a7812b9aeae629881980618f079932869151 # v4
-
-      - name: Install dependencies
-        run: aube ci
-
-      - name: Build and package
-        run: aubr all
-
-      - name: autofix.ci
-        uses: autofix-ci/action@c5b2d67aa2274e7b5a18224e8171550871fc7e4a # v1