[pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

setup.cfg

diff --git a/setup.cfg b/setup.cfg
index 3b7e5ee..01397b9 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -10,7 +10,6 @@
 license = MIT
 license_files = LICENSE
 classifiers =
-    License :: OSI Approved :: MIT License
     Programming Language :: Python :: 3
     Programming Language :: Python :: 3 :: Only
     Programming Language :: Python :: Implementation :: CPython