fix(action): delete approve workflow as it does not work (#4453)

.github/workflows/approve_workflow_run.yml

@@ -1,22 +0,0 @@
-# https://docs.github.com/en/rest/reference/actions#approve-a-workflow-run-for-a-fork-pull-request
-
-name: "Approve Workflow Run"
-
-on:
-  workflow_run:
-    workflows: ['build', 'project_euler', 'pre-commit', 'directory_writer']
-    types:
-      - completed
-
-jobs:
-  approve:
-    runs-on: ubuntu-latest
-    if: ${{ github.event.workflow_run.conclusion == 'action_required' }}
-    steps:
-      - name: "Automatically approve a workflow run"
-        run: |
-          curl \
-          --request POST \
-          --header "Accept: application/vnd.github.v3+json" \
-          --header "Authorization: token ${{ secrets.GITHUB_TOKEN }}" \
-          --url "https://api.github.com/repos/${{ github.repository }}/actions/runs/${{ github.event.workflow_run.id }}/approve"