ref(feedback): rm issue platform flags from SH section in dev doc

Author: aliu39

develop-docs/application/feedback-architecture.mdx

@@ -209,12 +209,6 @@ This feature is available if you enable the following feature flags.
 - `organizations:user-feedback-ui`
 - `organizations:user-feedback-replay-clip` (v24.7.1+)
 
-Auto-registered flags for issue platform (you won't be able to grep these in the sentry repo, but you need to enable them too):
-
-- `organizations:feedback-ingest`
-- `organizations:feedback-visible`
-- `organizations:feedback-post-process-group`
-
 You need to have v24.4.2 or higher in order to use the latest functionality of User
 Feedback, such as adding screenshots. Also note that User Feedback is only available
 in feature-complete Sentry, _not_ errors-only.