fix: remove broken links to non-existent reference pages

Removed links to /reference/audit-events/ and /reference/rbac-permissions/
from the Related sections since those pages don't exist in the repository.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

Author: ndbroadbent

docs/src/content/docs/user-guide/web-ui/api-tokens.mdx

@@ -81,5 +81,4 @@ curl -H "Authorization: Bearer rgw_..." \
 ## Related
 
 - [CLI Authentication](/user-guide/cli/authentication/) - Token usage in CLI
-- [RBAC Permissions](/reference/rbac-permissions/) - Permission details
 - [Deploy Approvals](/integrations/deploy-approvals/) - CI/CD workflow

docs/src/content/docs/user-guide/web-ui/audit-logs.mdx

@@ -128,6 +128,5 @@ For live monitoring:
 
 ## Related
 
-- [Audit Events Reference](/reference/audit-events/) - All event types
 - [Compliance Documentation](/security/compliance/) - Compliance features
 - [Monitoring](/operations/monitoring/) - Operational monitoring