Documentation does not clearly state that "Finding custom fields that are no longer used" is limited to Jira Datacenter only

Issue Summary

The documentation at https://confluence.atlassian.com/adminjiraserver0820/analyzing-the-usage-of-custom-fields-1095777020.html has a section "Finding custom fields that are no longer used" which mentions sorting the records by issues. And the "Optimize" link is also provided in the image on the top right. 

But the Jira Server version does not have Issues column available, and the "Optimize" link. The page has a drop-down for versions, and it says it applies for "Jira Server and DataCenter". But is not applicable for Server versions.

Expected Results

• A disclaimer is to be added on the page at the top stating that this image or the section corresponds to only Jira DataCenter. This feature is not present in Jira Server versions.

Actual Results

• No disclaimer and no information on this page that specifies that the section is only for Jira DataCenter.

Workaround

Provide the below page to users that has the disclaimer: https://confluence.atlassian.com/adminjiraserver/optimizing-custom-fields-956713279.html