how to remove this

[Alexey?]

i want to remove some lines from the page source.

<!-- CSS Stylesheet -->
<style type="text/css" id="vbulletin_css">
/**
* vBulletin 3.8.2 CSS
* Style: 'style'; Style ID: 185
*/
@import url("clientscript/vbulletin_css/style-7356497b-00185.css");
</style>
<link rel="stylesheet" type="text/css" href="clientscript/vbulletin_important.css?v=382" />


<!-- / CSS Stylesheet -->

this is what i have when i done page source and i want that it will be like this

<!-- CSS Stylesheet -->
<style type="text/css" id="vbulletin_css">
@import url("clientscript/vbulletin_css/style-7356497b-00185.css");
</style>
<link rel="stylesheet" type="text/css" href="clientscript/vbulletin_important.css?v=382" />


<!-- / CSS Stylesheet -->

and i know for sure that it is possible because i saw it in one other forum/