[DOC-13150]: Feedback on Upgrade | Couchbase Docs (#3802)

Remove duplicate upgrade instructions in documentation

Author: RayOffiah

modules/install/pages/upgrade.adoc

@@ -151,15 +151,6 @@ For example, if you are upgrading three enterprise nodes (`*Node{nbsp}1*`, `*Nod
 `*Node{nbsp}2*` => 5.1x -> 6.6 +
 `*Node{nbsp}3*` => 5.1x -> 6.6
 
-
-
-| {counter: upgrade}
-| Upgrade all nodes from 6.6 to 7.2.3
-|
-`*Node{nbsp}1*` => 6.6 -> 7.2.3 +
-`*Node{nbsp}2*` =>  6.6 -> 7.2.3 +
-`*Node{nbsp}3*` => 6.6 -> 7.2.3
-
 | {counter: upgrade}
 | Upgrade all nodes from 6.6 to 7.2.3
 |