Remove ignore comment after django-stubs fix

django.core.checks.registry.CheckRegistry.register is now typed correctly.

csp/apps.py

@@ -8,6 +8,4 @@ class CspConfig(AppConfig):
     name = "csp"
 
     def ready(self) -> None:
-        # Ignore known issue typeddjango/django-stubs #2232
-        # The overload of CheckRegistry.register as a function is incomplete
-        checks.register(check_django_csp_lt_4_0, checks.Tags.security)  # type: ignore
+        checks.register(check_django_csp_lt_4_0, checks.Tags.security)