When removing a filter from a Content View, it is completely lost immediately. For the benefit of history tracking (audit), roll back and for possible reuse in other CVs it would be beneficial to have all filters archived and selectable for reuse. In addition, transactions like adding/removing/changing a filter for a CV should be listed in the History.
Since this issue was entered in Red Hat Bugzilla, the release flag has been set to ? to ensure that it is properly evaluated for this release.
This is an older bug which I do not envision being addressed in the near term. I am closing this out. If you believe doing so is an issue, please feel free to re-open and provide additional business information. Thank you.