Remove deprecated license_file option

GalaxySnail · GalaxySnail · commit 7e99a7139ff0 · 2023-09-23T17:52:55.000+08:00
`license_file` is deprecated since setuptools v56.0.0 [1] [1] https://setuptools.pypa.io/en/latest/history.html#v56-0-0
diff --git a/setup.cfg b/setup.cfg
@@ -1,5 +1,2 @@
 [bdist_wheel]
 universal = 1
-
-[metadata]
-license_file = LICENSE
