So my team and I just converted from CA Agile Center (formerly Rally) to Jira. We migrated everything over and are working on our configuration of the system. One thing that Rally did was you had iterations and each iteration contained the user stories or bugs that you added to it and in the top left corner you could toggle between those sprints to see what was in each of them. In Jira, we created all of the historic sprints to move stories and bugs into post conversion. Now that I have a dozen sprints in my view on the Backlog screen in Jira, how do I remove them from that view?