To Delete a Change Request

Users having the required permission may delete a change request, so long as it is free of all relationships to other objects.

Note: Deleting a change request might destroy valuable historical information; consider changing the change request's status to Cancelled instead.

Expose the change request you want to delete in the Content pane, either by selecting it in the navigator or by searching for it.
Click the Delete icon or link in the Task pane.
When prompted, click Yes to confirm deletion.