chore: remove the auto-publish workflow

Inherited from the original repo. It fires on every pyproject.toml change
and immediately fails, because the Stillfront org blocks third-party GitHub
Actions and `Comfy-Org/publish-node-action` is not on the allowlist. Each
version bump therefore produced a failure email for no benefit.

Publishing is done manually with `comfy node publish`. Recoverable from
history if the action is ever allowlisted.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

.github/workflows/publish_action.yml

@@ -1,20 +0,0 @@
-name: Publish to Comfy registry
-on:
-  workflow_dispatch:
-  push:
-    branches:
-      - main
-    paths:
-      - "pyproject.toml"
-
-jobs:
-  publish-node:
-    name: Publish Custom Node to registry
-    runs-on: ubuntu-latest
-    steps:
-      - name: Check out code
-        uses: actions/checkout@v4
-      - name: Publish Custom Node
-        uses: Comfy-Org/publish-node-action@main
-        with:
-          personal_access_token: ${{ secrets.REGISTRY_ACCESS_TOKEN }}