refactor: Removes the Filter Box code (#26328)

Co-authored-by: John Bodley <john.bodley@gmail.com>

tests/integration_tests/dashboards/commands_tests.py

@@ -551,14 +551,9 @@ class TestImportDashboardsCommand(SupersetTestCase):
         }
         assert json.loads(dashboard.json_metadata) == {
             "color_scheme": None,
-            "default_filters": "{}",
             "expanded_slices": {str(new_chart_id): True},
-            "filter_scopes": {
-                str(new_chart_id): {
-                    "region": {"scope": ["ROOT_ID"], "immune": [new_chart_id]}
-                },
-            },
             "import_time": 1604342885,
+            "native_filter_configuration": [],
             "refresh_frequency": 0,
             "remote_id": 7,
             "timed_refresh_immune_slices": [new_chart_id],