Remove Ponos from CE

Based on !2227 (merged)

TODO:

• Remove & update tests

arkindex/ponos/tests/test_admin.py

-from pathlib import Path
-
-from django.test import TestCase, override_settings
-
-from arkindex.ponos.admin import ClearTextSecretForm, SecretAdmin
-from arkindex.ponos.models import Secret, encrypt
-
-PONOS_PRIVATE_KEY = Path(__file__).absolute().parent / "fixtures" / "ponos.key"
-
-
-class TestAdmin(TestCase):
-
-    @override_settings(PONOS_PRIVATE_KEY=PONOS_PRIVATE_KEY)
-    def test_admin_read_secret(self):
-        """
-        Admin form display the decrypted content of the stored secrets
-        """
-        nonce = b"1337" * 4
-        encrypted = encrypt(nonce, "Shhhh")
-        secret = Secret.objects.create(
-            name="important_secret",
-            nonce=b"1337" * 4,
-            content=encrypted,
-        )
-        self.assertEqual(secret.content, b"\xa3\xda\x9b\x91#")
-        form = ClearTextSecretForm(instance=secret)
-        self.assertEqual(form.initial.get("content"), "Shhhh")
-
-    @override_settings(PONOS_PRIVATE_KEY=PONOS_PRIVATE_KEY)
-    def test_admin_updates_secret(self):
-        nonce = b"1337" * 4
-        encrypted = encrypt(nonce, "Shhhh")
-        secret = Secret.objects.create(
-            name="important_secret",
-            nonce=b"1337" * 4,
-            content=encrypted,
-        )
-
-        secret_admin = SecretAdmin(model=Secret, admin_site=None)
-        form = ClearTextSecretForm(
-            data={"id": secret.id, "name": secret.name, "content": "Ah"},
-            instance=secret,
-        )
-        self.assertEqual(secret.content, b"\xa3\xda\x9b\x91#")
-        secret_admin.save_form(request=None, form=form, change=True)
-        self.assertEqual(secret.content, b"\xb1\xda")
-        self.assertEqual(b"\xb1\xda", encrypt(secret.nonce, "Ah"))