chore: Remove CTA A/B Testing legacy system

This feature was not part of the current development phase.

Deleted files:
- Inc/cta-ab-testing.php (A/B testing implementation)
- Inc/customizer-cta.php (WordPress Customizer settings + Google Analytics)
- TemplateParts/content-cta.php (CTA template part)
- Assets/Js/cta-tracking.js (GA4 tracking script)

Modified files:
- functions.php: Remove require_once for deleted files
- functions-addon.php: Remove CTA loading references
- Inc/enqueue-scripts.php: Remove roi_enqueue_cta_assets() function

Note: CTA components in Admin Panel (CtaBoxSidebar, CtaLetsTalk, CtaPost)
are NOT affected - they are part of the Clean Architecture system.

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

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

functions.php

@@ -55,8 +55,6 @@ require_once get_template_directory() . '/Inc/apu-tables.php';
 require_once get_template_directory() . '/Inc/search-disable.php';
 require_once get_template_directory() . '/Inc/comments-disable.php';
 require_once get_template_directory() . '/Inc/social-share.php';
-require_once get_template_directory() . '/Inc/cta-ab-testing.php';
-require_once get_template_directory() . '/Inc/customizer-cta.php';
 
 // =============================================================================
 // 3. INICIALIZAR DI CONTAINER (Clean Architecture)