Remove Starter references

Remove references to now-EoS Starter tier.

doc/api/feature_flags.md

@@ -6,9 +6,8 @@ info: To determine the technical writer assigned to the Stage/Group associated w
 
 # Feature Flags API **(FREE)**
 
-> - [Introduced](https://gitlab.com/gitlab-org/gitlab/-/issues/9566) in [GitLab Premium](https://about.gitlab.com/pricing/) 12.5.
-> - [Moved](https://gitlab.com/gitlab-org/gitlab/-/issues/212318) to [GitLab Starter](https://about.gitlab.com/pricing/) in 13.4.
-> - [Moved](https://gitlab.com/gitlab-org/gitlab/-/issues/212318) to [GitLab Free](https://about.gitlab.com/pricing/) in 13.5.
+> - [Introduced](https://gitlab.com/gitlab-org/gitlab/-/issues/9566) in GitLab Premium 12.5.
+> - [Moved](https://gitlab.com/gitlab-org/gitlab/-/issues/212318) to GitLab Free in 13.5.
 
 API for accessing resources of [GitLab Feature Flags](../operations/feature_flags.md).
 

doc/api/feature_flags_legacy.md

@@ -6,9 +6,8 @@ info: To determine the technical writer assigned to the Stage/Group associated w
 
 # Legacy Feature Flags API **(FREE)**
 
-> - [Introduced](https://gitlab.com/gitlab-org/gitlab/-/issues/9566) in [GitLab Premium](https://about.gitlab.com/pricing/) 12.5.
-> - [Moved](https://gitlab.com/gitlab-org/gitlab/-/issues/212318) to [GitLab Starter](https://about.gitlab.com/pricing/) in 13.4.
-> - [Moved](https://gitlab.com/gitlab-org/gitlab/-/issues/212318) to [GitLab Free](https://about.gitlab.com/pricing/) in 13.5.
+> - [Introduced](https://gitlab.com/gitlab-org/gitlab/-/issues/9566) in GitLab Premium 12.5.
+> - [Moved](https://gitlab.com/gitlab-org/gitlab/-/issues/212318) to GitLab Free in 13.5.
 
 WARNING:
 This API is deprecated and [scheduled for removal in GitLab 14.0](https://gitlab.com/gitlab-org/gitlab/-/issues/213369). Use [this API](feature_flags.md) instead.