Rely on setuptools 56 and drop the explicit mention of the license file in favor of simple discovery.

Author: jaraco

pyproject.toml

@@ -1,5 +1,5 @@
 [build-system]
-requires = ["setuptools>=42", "wheel", "setuptools_scm[toml]>=3.4.1"]
+requires = ["setuptools>=56", "wheel", "setuptools_scm[toml]>=3.4.1"]
 build-backend = "setuptools.build_meta"
 
 [tool.black]

setup.cfg

@@ -1,6 +1,4 @@
 [metadata]
-license_files =
-	LICENSE
 name = skeleton
 author = Jason R. Coombs
 author_email = [email protected]