Update delete operations docs - feature is in main branch

Remove feature branch warning since delete operations are now
integrated into the main codebase. Updated to reflect that it
just needs to be enabled via configuration.

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

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

Author: Ignacio Van Droogenbroeck

docs/data-lifecycle/delete-operations.md

@@ -6,8 +6,8 @@ sidebar_position: 2
 
 Arc supports deleting data using a rewrite-based approach that provides precise deletion with zero overhead on write and query operations.
 
-:::caution Feature Branch
-This feature is available in the `feature/rewrite-based-delete` branch and must be explicitly enabled in configuration.
+:::caution Configuration Required
+Delete operations must be explicitly enabled in configuration for safety.
 :::
 
 ## Overview