Drop decorators.py since it is not needed anymore

aleksis/core/decorators.py

-from typing import Callable
-
-from django.contrib.auth.decorators import login_required, user_passes_test
-
-from .util.core_helpers import has_person
-
-
-def admin_required(function: Callable = None) -> Callable:
-    actual_decorator = user_passes_test(lambda u: u.is_active and u.is_superuser)
-    return actual_decorator(function)
-
-
-def person_required(function: Callable = None) -> Callable:
-    """ Requires a logged-in user which is linked to a person. """
-
-    actual_decorator = user_passes_test(has_person)
-    return actual_decorator(login_required(function))