Expected Behavior
"All Messages Routing" should not contain any deleted rules
Current Behavior
After deleting an input, the rule is deleted, but still retained in the pipeline.
Possible Solution
Steps to Reproduce (for bugs)
- Create an input, route messages to a stream
- Delete the input
- Delete rule is still referenced in the "All Messages Routing" pipeline

Context
Your Environment
- Graylog Version: 6.2.0-beta.1-1
- Java Version:
- OpenSearch Version:
- MongoDB Version:
- Operating System:
- Browser version: