# What this PR does
Closes https://github.com/grafana/oncall-private/issues/2449
## Checklist
- [x] Unit, integration, and e2e (if applicable) tests updated
- [x] Documentation added (or `pr:no public docs` PR label added if not
required)
- [x] `CHANGELOG.md` updated (or `pr:no changelog` PR label added if not
required)
# What this PR does
- add `common.oncall_gateway.tasks.create_slack_connector_async_v2`
celery task to `CELERY_TASK_ROUTES`
- remove two deprecated tasks in `common.oncall_gateway.tasks`
## Checklist
- [x] Unit, integration, and e2e (if applicable) tests updated
- [x] Documentation added (or `pr:no public docs` PR label added if not
required)
- [x] `CHANGELOG.md` updated (or `pr:no changelog` PR label added if not
required)
# What this PR does
These celery tasks have not been used for more than one week (since
[v1.3.25](https://github.com/grafana/oncall/releases/tag/v1.3.25) which
released an improvement for Grafana Alerting integration)
## Checklist
- [ ] Unit, integration, and e2e (if applicable) tests updated
- [x] Documentation added (or `pr:no public docs` PR label added if not
required)
- [x] `CHANGELOG.md` updated (or `pr:no changelog` PR label added if not
required)
# What this PR does
This task was renamed in a v1.3.30. It is no longer referenced and there
are no pending tasks in production queues:

## Checklist
- [ ] Unit, integration, and e2e (if applicable) tests updated
- [x] Documentation added (or `pr:no public docs` PR label added if not
required)
- [x] `CHANGELOG.md` updated (or `pr:no changelog` PR label added if not
required)
# What this PR does
- Add a test to ensure celery tasks are assigned to a queue
- Move CELERY_TASK_ROUTES out of settings into its own file for easier
reuse and reference.
## Which issue(s) this PR fixes
## Checklist
- [x] Unit, integration, and e2e (if applicable) tests updated
- [x] Documentation added (or `pr:no public docs` PR label added if not
required)
- [x] `CHANGELOG.md` updated (or `pr:no changelog` PR label added if not
required)