remove pr automation until service account creation (#1080)

.github/workflows/pr.yaml

@@ -1,17 +0,0 @@
-# Uses https://github.com/actions/add-to-project example to add PR to Anchore OSS project
-name: Add pr to OSS project
-
-on:
-  pull_request:
-    types:
-      - opened
-
-jobs:
-  add-to-project:
-    name: Add pr to project
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/add-to-project@main
-        with:
-          project-url: https://github.com/orgs/anchore/projects/22
-          github-token: ${{ secrets.CI_WRITE_GITHUB_TOKEN }}