Remove unnecessary assertions

Author: amc-corey-cox

tests/test_importers/test_rdfs_importer.py

@@ -32,8 +32,6 @@ def test_import_foaf():
     engine = RdfsImportEngine()
     schema = engine.convert(FOAF)
     sv = SchemaView(schema)
-    assert sv.all_classes() == {}
-    assert sv.all_slots() == {}
     assert sv.get_slot("knows").range == "Person"
     assert sv.schema.default_prefix == "foaf"
     assert "foaf" in sv.schema.prefixes