Remove outdated GitLab version references

Remove outdated GitLab version references

doc/administration/audit_events.md

@@ -137,8 +137,6 @@ Project event queries are limited to a maximum of 30 days.
 
 ### Instance events **(PREMIUM SELF)**
 
-> [Introduced](https://gitlab.com/gitlab-org/gitlab/-/issues/2336) in GitLab 9.3.
-
 Server-wide audit events introduce the ability to observe user actions across
 the entire instance of your GitLab server, making it easy to understand who
 changed what and when for audit purposes.

doc/api/events.md

@@ -87,10 +87,6 @@ GitLab removes events older than 3 years from the events table for performance r
 
 ## List currently authenticated user's events
 
->**Notes:**
-> This endpoint was introduced in GitLab 9.3.
-> `read_user` access was introduced in GitLab 11.3.
-
 Get a list of events for the authenticated user. Scope `read_user` or `api` is required.
 
 ```plaintext
@@ -163,10 +159,6 @@ Example response:
 
 ### Get user contribution events
 
->**Notes:**
-> Documentation was formerly located in the [Users API pages](users.md).
-> `read_user` access was introduced in GitLab 11.3.
-
 Get the contribution events for the specified user, sorted from newest to oldest. Scope `read_user` or `api` is required.
 
 ```plaintext