@AutoPayloadType(description = "The created event, if present")
suspend fun removeIssueRelation(input: RemoveIssueRelationInput, dfe: DataFetchingEnvironment): RemovedOutgoingRelationEvent?

Removes an IssueRelation from an Issue, require MANAGE_ISSUES on any of the Trackables the Issue the IssueRelation starts at is on. If the IssueRelation was already removed, no event is created.