Remove extra line from AI Network docs

doc/subscriptions/subscription-add-ons.md

@@ -69,7 +69,7 @@ Prerequisites:
 For all self-managed AI features:
 
 - Your firewalls and HTTP/S proxy servers must allow outbound connections
-  to `gitlab.com` and `cloud.gitlab.com` on port `443`.
+  to `cloud.gitlab.com` on port `443`.
 - Both `HTTP2` and the `'upgrade'` header must be allowed, because GitLab Duo
   uses both REST and WebSockets.
 - To use an HTTP/S proxy, both `gitLab_workhorse` and `gitLab_rails` must have the necessary

doc/user/ai_features.md

@@ -65,7 +65,7 @@ To enable Beta and Experimental AI-powered features for GitLab versions where Gi
 ### Enable outbound connections to enable GitLab Duo features on Self-managed instances
 
 - Your firewalls and HTTP/S proxy servers must allow outbound connections
-  to `gitlab.com` and `cloud.gitlab.com` on port `443`.
+  to `cloud.gitlab.com` on port `443`.
 - Both `HTTP2` and the `'upgrade'` header must be allowed, because GitLab Duo
   uses both REST and WebSockets.
 - To use an HTTP/S proxy, both `gitLab_workhorse` and `gitLab_rails` must have the necessary