Removed outdated versions from Log system page

doc/administration/logs.md

@@ -245,8 +245,6 @@ The request was processed by `Projects::TreeController`.
 
 ## `api_json.log`
 
-> Introduced in GitLab 10.0.
-
 Depending on your installation method, this file is located at:
 
 - Omnibus GitLab: `/var/log/gitlab/gitlab-rails/api_json.log`
@@ -367,8 +365,6 @@ like this example:
 
 ## `kubernetes.log`
 
-> Introduced in GitLab 11.6.
-
 Depending on your installation method, this file is located at:
 
 - Omnibus GitLab: `/var/log/gitlab/gitlab-rails/kubernetes.log`
@@ -696,8 +692,6 @@ on a project.
 
 ## `importer.log`
 
-> Introduced in GitLab 11.3.
-
 Depending on your installation method, this file is located at:
 
 - Omnibus GitLab: `/var/log/gitlab/gitlab-rails/importer.log`
@@ -915,8 +909,6 @@ For example:
 
 ## `geo.log` **(PREMIUM SELF)**
 
-> Introduced in 9.5.
-
 Geo stores structured log messages in a `geo.log` file. For Omnibus GitLab
 installations, this file is at `/var/log/gitlab/gitlab-rails/geo.log`.
 
@@ -934,8 +926,6 @@ This message shows that Geo detected that a repository update was needed for pro
 
 ## `update_mirror_service_json.log`
 
-> [Introduced](https://gitlab.com/gitlab-org/gitlab/-/commit/7f637e2af7006dc2b1b2649d9affc0b86cfb33c4) in GitLab 11.12.
-
 Depending on your installation method, this file is located at:
 
 - Omnibus GitLab: `/var/log/gitlab/gitlab-rails/update_mirror_service_json.log`