Disable scripts inside joomla template

params.php

<?php 
$doc = JFactory::getDocument();

// Supposes you have a template setting with name loadJquery
$loadJquery = $this->params->get('loadJquery', 1);

if ($loadJquery)
{
	$removeJs = array(
		'/jquery.min.js',
		'/jquery.js',
		'/jquery-noconflict.js',
		'/jquery-migrate.min.js',
		'/jquery-migrate.js',
		'/bootstrap.min.js',
		'/bootstrap.js',
	);

	$scripts = $doc->_scripts;

	foreach ($removeJs as $removeScript)
	{
		foreach ($scripts as $script => $scriptdata)
		{
			if (stristr($script, $removeScript))
			{
				unset($scripts[$script]);
			}
		}
	}

	$doc->_scripts = $scripts;
}