Remove RBAC for Indexes beta article (#4645)

Author: jpipkin1

cid-redirects.json

@@ -3996,6 +3996,7 @@
   "/docs/manage/security/search-audit-index": "/docs/manage/security/audit-indexes/search-audit-index",
   "/docs/manage/security/audit-index-access": "/docs/manage/users-roles/roles/create-manage-roles",
   "/docs/manage/security/audit-indexes/audit-index-access/": "/docs/manage/users-roles/roles/create-manage-roles",
+  "/docs/manage/users-roles/roles/rbac-for-indexes": "/docs/manage/users-roles/roles/create-manage-roles",
   "/cid/-1": "/",
   "/docs/api/beta": "/docs/api",
   "/docs/api/dashboard-data": "/docs/api/dashboard",