Export project losts jqBootstrapValidation.js or formHandler.js in js folder

I Need Help
1

I export the project. And in some of the pages, they used

	<script src="./js/jqBootstrapValidation.js"></script>
	<script src="./js/formHandler.js"></script>

in head section.
But I don’t find jqBootstrapValidation.js or formHandler.js in js folder. The js folder only has bloc.js bootstrap jquery lazysizes.
Is this a problem?
THANKS