digger should refresh existing statuses when a project is removed in a pr push

[motatoes]

Scenario:

1. somebody creates PR with three different resources inside
2. digger starts and detects three resources, runs plans and in the Github status checks we can see three entries
   a. project_some_resource_A/plan [green]
   b. project_some_resource_B/plan [green]
   c. project_some_resource_C/plan [green]
3. author of PR noticed that resource B is not needed and the code has been added by mistake
4. the new commit is pushed to the branch, resource B is removed from the code
5. diggers starts again and detects two resources, runs plans but in the Github status checks we can see still three entries
   a. project_some_resource_A/plan [green]
   b. project_some_resource_B/plan [yellow: pending]
   c. project_some_resource_C/plan [green]
6. even after running apply GitHub status check is still waiting for project_some_resource_B/plan which doesn't exist in the code, so it's not gonna be planned

After removal of the resource B digger should remove that status check or mark it as completed (as a part of the PR push)