Update pyproject toml to use licence from classifiers.

Author: fkdosilovic

pyproject.toml

@@ -5,7 +5,6 @@ description = "The official Python library for Judge0."
 readme = "README.md"
 requires-python = ">=3.9"
 authors = [{ name = "Judge0", email = "support@judge0.com" }]
-license = { file = "LICENSE" }
 classifiers = [
     "Intended Audience :: Developers",