remove PR label enforcement workflow (#1015)

.github/workflows/require-pr-labels.yaml

@@ -1,25 +0,0 @@
-name: Require pull request labels
-
-permissions:
-  pull-requests: read
-
-on:
-  pull_request:
-    types:
-      - opened
-      - labeled
-      - unlabeled
-      - synchronize
-
-jobs:
-  require-pr-labels:
-    uses: replicatedhq/reusable-workflows/.github/workflows/pr-enforce-labels.yaml@main
-  require-bug-labels:
-    runs-on: ubuntu-latest
-    steps:
-      - uses: mheap/github-action-required-labels@v3
-        if: ${{ github.event.label.name == 'type::bug' }}
-        with:
-          mode: exactly
-          count: 1
-          labels: "bug::normal, bug::regression"