Delete upstream workflows

This fork does not ship upstream's releases, and its hosted-runner jobs
never start here.

Claude-Session: https://claude.ai/code/session_01HuMDfgFssPUptYUzgZ6Cp8

.github/workflows/nodejs.yml

@@ -1,31 +0,0 @@
-# This workflow will do a clean install of node dependencies, build the source code and run tests across different versions of node
-# For more information see: https://help.github.com/actions/language-and-framework-guides/using-nodejs-with-github-actions
-
-name: Node.js CI
-
-on:
-  push:
-    branches: [main]
-  pull_request:
-    branches: [main]
-
-jobs:
-  build:
-    runs-on: ubuntu-latest
-
-    strategy:
-      matrix:
-        node-version: [20, 22]
-
-    steps:
-      - uses: actions/checkout@v4
-      - name: Use Node.js ${{ matrix.node-version }}
-        uses: actions/setup-node@v4
-        with:
-          node-version: ${{ matrix.node-version }}
-          cache: 'npm'
-
-      - name: Install dependencies
-        run: npm install
-
-      - run: npm test

.github/workflows/prepare-release.yml

@@ -1,56 +0,0 @@
-name: Prepare Release
-
-on:
-  workflow_dispatch:
-  push:
-    tags:
-      - 'v*'
-
-permissions:
-  contents: read
-
-jobs:
-  prepare:
-    permissions:
-      contents: write # for softprops/action-gh-release to create GitHub release
-
-    runs-on: ubuntu-latest
-
-    strategy:
-      matrix:
-        node-version: [22]
-
-    steps:
-      - uses: actions/checkout@v4
-
-      - name: Use Node.js ${{ matrix.node-version }}
-        uses: actions/setup-node@v4
-        with:
-          node-version: ${{ matrix.node-version }}
-          registry-url: 'https://registry.npmjs.org'
-          cache: 'npm'
-
-      - name: Install dependencies
-        run: npm install
-
-      - name: Test
-        run: npm test
-
-      - name: Resolve version
-        id: vars
-        run: |
-          echo "TAG_NAME=$(git describe --tags --abbrev=0)" >> $GITHUB_ENV
-
-      - name: Get release notes
-        run: |
-          RELEASE_NOTES=$(npm run release-notes --silent)
-          echo "RELEASE_NOTES<<EOF" >> $GITHUB_ENV
-          echo "$RELEASE_NOTES" >> $GITHUB_ENV
-          echo "EOF" >> $GITHUB_ENV
-
-      - name: Release
-        uses: softprops/action-gh-release@v1
-        with:
-          draft: true
-          tag_name: ${{ env.TAG_NAME }}
-          body: ${{ env.RELEASE_NOTES }}

.github/workflows/release.yml

@@ -1,53 +0,0 @@
-name: Release
-
-on:
-  push:
-    branches: [main]
-  release:
-    types: [published]
-
-permissions:
-  contents: read
-  id-token: write
-
-jobs:
-  build:
-    runs-on: ubuntu-latest
-
-    strategy:
-      matrix:
-        node-version: [24]
-
-    steps:
-      - uses: actions/checkout@v4
-
-      - name: Use Node.js ${{ matrix.node-version }}
-        uses: actions/setup-node@v4
-        with:
-          node-version: ${{ matrix.node-version }}
-          registry-url: 'https://registry.npmjs.org'
-          cache: 'npm'
-
-      - name: Install dependencies
-        run: npm install
-
-      - name: Test
-        run: npm test
-
-      - name: Resolve release metadata
-        run: |
-          if [ "${{ github.event_name }}" = "release" ]; then
-            echo "RELEASE_KIND=release" >> $GITHUB_ENV
-            echo "RELEASE_CHANNEL=$(npm run release-channel --silent)" >> $GITHUB_ENV
-          else
-            echo "RELEASE_KIND=insiders" >> $GITHUB_ENV
-            echo "INSIDERS_VERSION=0.0.0-insiders.$(git rev-parse --short HEAD)" >> $GITHUB_ENV
-            echo "RELEASE_CHANNEL=insiders" >> $GITHUB_ENV
-          fi
-
-      - name: Version based on commit
-        if: env.RELEASE_KIND == 'insiders'
-        run: npm version "$INSIDERS_VERSION" --force --no-git-tag-version
-
-      - name: Publish
-        run: npm publish --provenance --tag "$RELEASE_CHANNEL"