Improve Gitaly TLS setup details

doc/administration/gitaly/index.md

@@ -532,13 +532,9 @@ corresponding to each Gitaly server must be installed on that Gitaly server.
 
 Additionally, the certificate (or its certificate authority) must be installed on all:
 
-- Gitaly servers, including the Gitaly server using the certificate.
+- Gitaly servers.
 - Gitaly clients that communicate with it.
 
-The process is documented in the
-[GitLab custom certificate configuration](https://docs.gitlab.com/omnibus/settings/ssl.html#install-custom-public-certificates)
-and repeated below.
-
 Note the following:
 
 - The certificate must specify the address you use to access the Gitaly server. If you are: