fix: remove deprecated license classifier, use SPDX instead

Author: judotens

pyproject.toml

@@ -15,7 +15,6 @@ authors = [
 keywords = ["flatseek", "profiling", "performance"]
 classifiers = [
     "Development Status :: 3 - Alpha",
-    "License :: OSI Approved :: Apache Software License :: Version 2.0",
     "Programming Language :: Python :: 3",
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",