Removed add issue to backlog

Author: britzl

.github/workflows/add-issue-to-project.yml

@@ -5,28 +5,4 @@ Repository contains set of reusable Github workflows which can be used in differ
 ## Available actions and workflows
 
 - [`defoldsdk` reusable workflow](./.github/workflows/defoldsdk.yml)
-- [`add-issue-to-project` reusable workflow](./.github/workflows/add-issue-to-project.yml)
 - [`android` composite action](./.github/actions/android/README.md)
-
-## Add new issues to a Project
-
-Add this workflow to a repository that should send newly opened issues to a GitHub Project v2:
-
-```yaml
-name: Add new issues to project
-
-on:
-  issues:
-    types: [opened]
-
-jobs:
-  add-issue-to-project:
-    uses: defold/github-actions-common/.github/workflows/add-issue-to-project.yml@<ref>
-    with:
-      project_owner: defold
-      project_number: 1
-    secrets:
-      PROJECT_TOKEN: ${{ secrets.PROJECT_TOKEN }}
-```
-
-`PROJECT_TOKEN` should be a PAT or GitHub App token with write access to the target Project and read access to the issue repository. If it is not provided, the reusable workflow falls back to `github.token`.