[Data checks] Simplify way to find out if celery is enabled

aleksis/core/data_checks.py

@@ -197,6 +197,8 @@ def check_data():
     if get_site_preferences()["general__data_checks_send_emails"]:
         send_emails_for_data_checks()
 
+    return True
+
 
 def send_emails_for_data_checks():
     """Notify one or more recipients about new problems with data.

aleksis/core/views.py

@@ -728,8 +728,7 @@ class RunDataChecks(PermissionRequiredMixin, View):
     permission_required = "core.run_data_checks"
 
     def get(self, request: HttpRequest, *args, **kwargs) -> HttpResponse:
-        check_data()
-        if is_celery_enabled():
+        if not check_data():
             messages.success(
                 request,
                 _(