chore: classifiers should not be present with SPDX license (#643)

Signed-off-by: Henry Schreiner <[email protected]>

Author: henryiii

pyproject.toml

@@ -15,7 +15,6 @@ authors = [
 classifiers = [
     "Framework :: Matplotlib",
     "Intended Audience :: Science/Research",
-    "License :: OSI Approved :: MIT License",
     "Programming Language :: Python :: 3",
     "Programming Language :: Python :: 3 :: Only",
     "Programming Language :: Python :: 3.9",