[FIX] pass flake8

docs/conf.py

@@ -10,7 +10,7 @@ from sphinx.application import Sphinx
 # -- Path setup --------------------------------------------------------------
 
 sys.path.insert(0, os.path.abspath(".."))
-import ablkit  # noqa: E402
+import ablkit  # noqa: E402,F401
 
 # -- Project information -----------------------------------------------------