fix: remove persona partial from thin wrapper page (level-0 heading conflict)

configuring-cluster-roles-for-users.adoc is a thin wrapper that includes
the full page content from administration-guide example snippet. Adding
a persona partial before that creates two level-0 headings, which breaks
Antora. The guide-level callout in the nav/master provides the persona
signal for this page.

Co-authored-by: Cursor <cursoragent@cursor.com>

Author: gtrivedi88

modules/secure/pages/configuring-cluster-roles-for-users.adoc

@@ -5,6 +5,4 @@
 :page-aliases: administration-guide:configuring-cluster-roles-for-users.adoc
 
 
-include::partial$snip_persona-admin.adoc[]
-
 include::administration-guide:example$snip_{project-context}-configuring-cluster-roles-for-users.adoc[]