ci: remove sync angular-robot forked repository workflow (#61675)

Renovate now supports syncing of non-default base branches, making this workflow obsolete.

PR Close #61675

.github/workflows/sync-angular-robot-forked-repo.yml

@@ -1,46 +0,0 @@
-# This workflow addresses a limitation with Renovate's behavior in fork mode.
-# Renovate does not automatically sync non-default branches in forked repositories.
-
-name: Sync angular-robot Forked Repository
-on:
-  workflow_dispatch:
-    inputs: {}
-  push:
-    branches:
-      # We do no run this on the default branch (main), as this is done by Renovate.
-      - '[0-9]+.[0-9]+.x'
-
-permissions:
-  contents: read
-
-jobs:
-  sync_to_upstream:
-    runs-on: ubuntu-latest
-    # Prevents multiple concurrent runs of this workflow for the same branch
-    concurrency:
-      group: ${{ github.workflow }}-${{ github.ref }}
-      cancel-in-progress: true
-
-    steps:
-      - name: Checkout the repository
-        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
-        with:
-          ref: ${{ github.ref }} # Checks out the branch that triggered the push
-          fetch-depth: 100
-          persist-credentials: false
-
-      - name: Push to angular-robot upstream remote
-        run: |
-          CURRENT_BRANCH="${{ github.ref_name }}"
-          UPSTREAM_TOKEN="${{ secrets.ANGULAR_ROBOT_ACCESS_TOKEN }}"
-          UPSTREAM_OWNER="angular-robot"
-          UPSTREAM_REPO="angular"
-          UPSTREAM_URL="https://x-access-token:${UPSTREAM_TOKEN}@github.com/${UPSTREAM_OWNER}/${UPSTREAM_REPO}.git"
-
-          # The UPSTREAM_TOKEN is automatically masked by GitHub Actions for security.
-          echo "Adding upstream remote: $UPSTREAM_URL"
-          git remote add upstream "$UPSTREAM_URL"
-          git remote -v
-
-          echo "Pushing $CURRENT_BRANCH from origin to $UPSTREAM_OWNER upstream..."
-          git push upstream "$CURRENT_BRANCH"