Upgrade docs, remove content for upgrading from v4/v5

docs/setup/upgrade/upgrade-standard.asciidoc

@@ -2,7 +2,7 @@
 === Standard upgrade
 
 NOTE: 7.17 includes an https://www.elastic.co/guide/en/kibana/7.17/upgrade-assistant.html[Upgrade Assistant]
-to help you prepare for your upgrade to 7.0. To access the assistant, go to *Stack Management > Upgrade Assistant*.
+to help you prepare for your upgrade to 8.0. To access the assistant, go to *Stack Management > Upgrade Assistant*.
 
 [IMPORTANT]
 ===========================================
@@ -29,12 +29,6 @@ Different versions of {kib} running against the same {es} index, such as during
 . Use `rpm` or `dpkg` to install the new package. All files should be placed in
   their proper locations and config files should not be overwritten.
 +
-[NOTE]
---
-{kib} 4.x used a different config location than 5.0+, so if you're upgrading
-from 4.x, you will need to copy the configurations from your old config
-(`/opt/kibana/config/kibana.yml`) to your new config
-(`/etc/kibana/kibana.yml`).
 
 Make sure you remove or update any configurations
 that are indicated in the <<breaking-changes-8.0.0,breaking changes>> documentation