Docs: Update removed feature flag information for Roadmap

doc/user/group/roadmap/index.md

@@ -36,13 +36,10 @@ toggle the list of the milestone bars.
 
 ## Sort and filter the Roadmap
 
-> - Filtering roadmaps by milestone [introduced](https://gitlab.com/gitlab-org/gitlab/-/issues/218621) in GitLab 13.7.
-> - Filtering roadmaps by milestone is [deployed behind a feature flag](../../feature_flags.md), enabled by default.
-> - Filtering roadmaps by milestone is enabled on GitLab.com.
-> - Filtering roadmaps by milestone is recommended for production use.
-> - For GitLab self-managed instances, GitLab administrators can opt to [disable it](#enable-or-disable-filtering-roadmaps-by-milestone). **(PREMIUM SELF)**
+> - Filtering by milestone [introduced](https://gitlab.com/gitlab-org/gitlab/-/issues/218621) in GitLab 13.7 [with a flag](../../../administration/feature_flags.md) named `roadmap_daterange_filter`. Enabled by default.
 > - Filtering by epic confidentiality [introduced](https://gitlab.com/gitlab-org/gitlab/-/issues/218624) in GitLab 13.9.
 > - Filtering by epic [introduced](https://gitlab.com/gitlab-org/gitlab/-/issues/218623) in GitLab 13.11.
+> - Filtering by milestone [feature flag removed](https://gitlab.com/gitlab-org/gitlab/-/issues/323917) in GitLab 14.5.
 
 WARNING:
 Filtering roadmaps by milestone might not be available to you. Check the **version history** note above for details.
@@ -77,25 +74,6 @@ You can also filter epics in the Roadmap view by the epics':
 
 Roadmaps can also be [visualized inside an epic](../epics/index.md#roadmap-in-epics).
 
-### Enable or disable filtering roadmaps by milestone **(PREMIUM SELF)**
-
-Filtering roadmaps by milestone is under development but ready for production use.
-It is deployed behind a feature flag that is **enabled by default**.
-[GitLab administrators with access to the GitLab Rails console](../../../administration/feature_flags.md)
-can opt to disable it.
-
-To enable it:
-
-```ruby
-Feature.enable(:async_filtering)
-```
-
-To disable it:
-
-```ruby
-Feature.disable(:async_filtering)
-```
-
 ## Timeline duration
 
 > - Introduced in [GitLab Ultimate](https://about.gitlab.com/pricing/) 11.0.
@@ -104,13 +82,8 @@ Feature.disable(:async_filtering)
 ### Date range presets
 
 > - [Introduced](https://gitlab.com/gitlab-org/gitlab/-/issues/204994) in GitLab 14.3. [Deployed behind the `roadmap_daterange_filter` flag](../../../administration/feature_flags.md), disabled by default.
-> - [Enabled on GitLab.com](https://gitlab.com/gitlab-org/gitlab/-/issues/323917) in GitLab 14.3.
-
-FLAG:
-On self-managed GitLab, by default this feature is not available. To make it available per group,
-ask an administrator to [enable the `roadmap_daterange_filter` flag](../../../administration/feature_flags.md).
-On GitLab.com, this feature is available.
-The feature is ready for production use.
+> - [Enabled on GitLab.com and self-managed](https://gitlab.com/gitlab-org/gitlab/-/issues/323917) in GitLab 14.3.
+> - [Feature flag `roadmap_daterange_filter` removed](https://gitlab.com/gitlab-org/gitlab/-/merge_requests/72419) in GitLab 14.5.
 
 Roadmap provides three date range options, each with predetermined timeline duration: