Failed to check mergeability of merge request - Removal Request
<!-- This template is a great use for issues that are feature::additions or technical tasks for larger issues.-->
### Proposal
Based off of [this previous MR](https://gitlab.com/gitlab-org/gitlab/-/merge_requests/79723) that was merged back in version `14.8`, I believe the error is still being written in the logs. I would like to propose that, if this is an error to be ignored, that we remove it from the logs.
If this is not something to be ignored, are we able to revisit this error?
### Related
[Internal Only](https://gitlab.zendesk.com/agent/tickets/304306) Premium customer seeing this error currently in `v14.9.5`
<!-- Label reminders
Use the following resources to find the appropriate labels:
- https://gitlab.com/gitlab-org/gitlab/-/labels
- https://about.gitlab.com/handbook/product/categories/features/
-->
issue