ref: delete unused never_cache (#82837)

<!-- Describe your PR here. -->

src/sentry/integrations/slack/views/__init__.py

@@ -2,23 +2,15 @@
 
 from django.http import HttpRequest, HttpResponse
 from django.urls import reverse
-from django.views.decorators.cache import never_cache as django_never_cache
 from rest_framework.request import Request
 
 from sentry.utils.http import absolute_uri
 from sentry.utils.signing import sign
-from sentry.web.decorators import EndpointFunc
 from sentry.web.helpers import render_to_response
 
 SALT = "sentry-slack-integration"
 
 
-def never_cache(view_func: EndpointFunc) -> EndpointFunc:
-    """TODO(mgaeta): Remove cast once Django has a typed version."""
-    result: EndpointFunc = django_never_cache(view_func)
-    return result
-
-
 def build_linking_url(endpoint: str, **kwargs: Any) -> str:
     """TODO(mgaeta): Remove cast once sentry/utils/http.py is typed."""
     url: str = absolute_uri(reverse(endpoint, kwargs={"signed_params": sign(salt=SALT, **kwargs)}))