Tidy pyproject.toml readme and license fields

Author: adamchainz

pyproject.toml

@@ -8,15 +8,14 @@ requires = [
 name = "django-cors-headers"
 version = "4.3.1"
 description = "django-cors-headers is a Django application for handling the server headers required for Cross-Origin Resource Sharing (CORS)."
-readme = { file = "README.rst", content-type = "text/x-rst" }
+readme = "README.rst"
 keywords = [
   "api",
   "cors",
   "django",
   "middleware",
   "rest",
 ]
-license = { text = "MIT" }
 maintainers = [
   { name = "Adam Johnson", email = "[email protected]" },
 ]