feat: remove pyflakes gh action

ruff supersedes it

.github/workflows/pyflakes.yml

@@ -1,20 +0,0 @@
-on:
-  pull_request:
-  push:
-    branches:
-      - main
-      - development
-      - 'release-candidate-*'
-
-jobs:
-  pyflakes:
-    name: runner / pyflakes
-    if: github.event.pull_request.draft == false
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v2
-      - name: pyflakes
-        uses: reviewdog/action-pyflakes@v1
-        with:
-          github_token: ${{ secrets.GITHUB_TOKEN }}
-          reporter: github-pr-review