fix flake8

tests/test_schemas.py

@@ -15,7 +15,7 @@ from dnadna.examples.one_event import DEFAULT_ONE_EVENT_CONFIG
 from dnadna.nets import Network
 from dnadna.utils.config import ConfigError, Config, load_dict
 from dnadna.utils.jsonschema import (make_config_meta_schema, SCHEMA_DIRS,
-        SCHEMA_SUPPORTED_VERSIONS, make_config_validator)
+        SCHEMA_SUPPORTED_VERSIONS)
 from dnadna.utils.plugins import Pluggable
 from dnadna.utils.misc import parse_format
 
@@ -81,8 +81,8 @@ def test_schemas_valid(schema, validator):
         type_checker=validator.TYPE_CHECKER,
         format_checker=format_checker,
         version=validator.__name__[:6]
-        )
-    
+    )
+
     # NOTE: We leave the full directory name out of the 'schema' parameter for
     # cleaner output when running `pytest -v`; instead join the filename with
     # the SCHEMA_DIR here.