chore: remove jQuery Migrate after successful modernization

Remove jQuery Migrate 3.4.1 as it is no longer needed. The codebase has been fully updated to use modern jQuery patterns (e.g., .on() instead of .bind()), and no deprecation warnings have appeared in the console.

This marks the completion of our migration:
1. Added Migrate to detect issues
2. Refactored legacy event bindings
3. Upgraded to jQuery 3.7.1
4. Removed Migrate — now

Author: RafaelJohn9

layouts/partials/footer.html

@@ -13,7 +13,6 @@
 
 <script src="https://code.jquery.com/jquery-3.7.1.min.js"></script>
 <script src="https://code.jquery.com/ui/1.14.1/jquery-ui.min.js"></script>
-<script src="https://code.jquery.com/jquery-migrate-3.4.1.js"></script>
 <script src="{{ relURL "js/jquery.defaultvalue.js" }}"></script>
 <script src="{{ relURL "js/session.min.js" }}"></script>
 {{ $js := resources.Get "js/application.js" | resources.ExecuteAsTemplate "js/application.js" . | resources.Minify | fingerprint }}