Remove indomain from docs

Temp. removing mention of indomain from docs to follow new GTM release process

Author: Osama Khan

src/connections/sources/catalog/libraries/website/javascript/custom-proxy.md

@@ -6,8 +6,6 @@ strat: ajs
 
 Custom domains allow you to proxy Analytics.js and proxy all tracking event requests through your domain.
 
-> success ""
-> Business Tier customers who want to use a fully-managed proxy service can contact their account teams for full details.
 
 ## Prerequisites