Revert "modellist: work around filtered item models getting out of sy…

…nc (#2545)"

This is what caused regression seen in issue #2943

This reverts commit 30692a2.

gpt4all-chat/src/modellist.cpp

@@ -1010,12 +1010,6 @@ void ModelList::updateData(const QString &id, const QVector<QPair<int, QVariant>
         }
     }
     emit dataChanged(createIndex(index, 0), createIndex(index, 0));
-
-    // FIXME(jared): for some reason these don't update correctly when the source model changes, so we explicitly invalidate them
-    m_selectableModels->invalidate();
-    m_installedModels->invalidate();
-    m_downloadableModels->invalidate();
-
     emit selectableModelListChanged();
 }