Remove tests and alternative Python implementations

Ad discussed here:
https://github.com/coding-horror/basic-computer-games/issues/548#issuecomment-1081008471

10_Blackjack/python/test_blackjack.py

@@ -1,17 +0,0 @@
-import io
-
-from _pytest.monkeypatch import MonkeyPatch
-from _pytest.capture import CaptureFixture
-
-from blackjack import main
-
-
-def test_blackjack(monkeypatch: MonkeyPatch, capsys: CaptureFixture[str]) -> None:
-    nb_players = 1
-    instructions = "y"
-    bet = 100
-    monkeypatch.setattr(
-        "sys.stdin",
-        io.StringIO(f"{nb_players}\n{instructions}\n\n{bet}\ns\nn\n"),
-    )
-    main()