Fix error in setup.cfg.

Author: netomi

tests/data/setup.cfg

@@ -10,7 +10,6 @@ install_requires =
 	requests >= 2.7.0
 	saneyaml >= 0.5.2
 	text_unidecode >= 1.0
-    pure-eval; black; tox;
 	typing >=3.6, < 3.7; python_version < "3.7"
 
 [options.extras_require]