chore: consolidate the Superset python package metadata

Following up on #27859, where
I introduced a new file `pyproject.toml` to set up the
python project metadata, here I'd like to consolidate and modernize
further by pushing as much as possible into pyproject.toml,
except where things need to be dynamic, for which we'll keep using
setup.py:

- get rid of setup.cfg, everything there should be able to move to
  pyproject.toml
- remove duplicate keys from setup.py and pyproject.toml
- minimize/simplify setup.py

pyproject.toml

@@ -23,7 +23,9 @@ build-backend = "setuptools.build_meta"
 name = "apache-superset"
 description = "A modern, enterprise-ready business intelligence web application"
 readme = "README.md"
-dynamic = ["version", "scripts", "entry-points", "license", "requires-python"]
+dynamic = ["version", "scripts", "entry-points"]
+requires-python = "~=3.9"
+license = { file="LICENSE.txt" }
 authors = [
     { name = "Apache Software Foundation", email = "[email protected]" },
 ]
@@ -197,3 +199,30 @@ development = [
 [project.urls]
 homepage = "https://superset.apache.org/"
 documentation = "https://superset.apache.org/docs/intro"
+
+
+[tool.isort]
+combine_as_imports = true
+include_trailing_comma = true
+line_length = 88
+known_first_party = "superset"
+known_third_party = "alembic, apispec, backoff, celery, click, colorama, cron_descriptor, croniter, cryptography, dateutil, deprecation, flask, flask_appbuilder, flask_babel, flask_caching, flask_compress, flask_jwt_extended, flask_login, flask_migrate, flask_sqlalchemy, flask_talisman, flask_testing, flask_wtf, freezegun, geohash, geopy, holidays, humanize, isodate, jinja2, jwt, markdown, markupsafe, marshmallow, msgpack, nh3, numpy, pandas, parameterized, parsedatetime, pgsanity, pkg_resources, polyline, prison, progress, pyarrow, sqlalchemy_bigquery, pyhive, pyparsing, pytest, pytest_mock, pytz, redis, requests, selenium, setuptools, shillelagh, simplejson, slack, sqlalchemy, sqlalchemy_utils, sqlparse, typing_extensions, urllib3, werkzeug, wtforms, wtforms_json, yaml"
+multi_line_output = 3
+order_by_type = false
+
+[tool.mypy]
+check_untyped_defs = true
+disallow_any_generics = true
+disallow_untyped_calls = true
+disallow_untyped_defs = true
+ignore_missing_imports = true
+no_implicit_optional = true
+warn_unused_ignores = true
+
+[tool.mypy."superset.migrations.versions.*"]
+ignore_errors = true
+
+[tool.mypy."tests.*"]
+check_untyped_defs = false
+disallow_untyped_calls = false
+disallow_untyped_defs = false

setup.py

@@ -23,12 +23,10 @@
 BASE_DIR = os.path.abspath(os.path.dirname(__file__))
 PACKAGE_JSON = os.path.join(BASE_DIR, "superset-frontend", "package.json")
 
+
 with open(PACKAGE_JSON) as package_file:
     version_string = json.load(package_file)["version"]
 
-with open("README.md", encoding="utf-8") as f:
-    long_description = f.read()
-
 
 def get_git_sha() -> str:
     try:
@@ -54,10 +52,6 @@ def get_git_sha() -> str:
 version_string = version_string.replace("-dev", ".dev0")
 
 setup(
-    name="apache-superset",
-    description="A modern, enterprise-ready business intelligence web application",
-    long_description=long_description,
-    long_description_content_type="text/markdown",
     version=version_string,
     packages=find_packages(),
     include_package_data=True,
@@ -75,6 +69,5 @@ def get_git_sha() -> str:
             "superset=superset.extensions.metadb:SupersetShillelaghAdapter"
         ],
     },
-    python_requires="~=3.9",
     download_url="https://www.apache.org/dist/superset/" + version_string,
 )