Why do I need customRules?

[MyWay]

I'm referring to:
// Rules to remove predefined jQuery and Bootstrap and MooTools More
GKParser::$customRules['/<script src="(.*?)media\/jui\/js\/jquery.min.js" type="text\/javascript"></script>/mi'] = '';
GKParser::$customRules['/<script src="(.*?)media\/jui\/js\/jquery-noconflict.js" type="text\/javascript"></script>/mi'] = '';
GKParser::$customRules['/<script src="(.*?)media\/jui\/js\/bootstrap.min.js" type="text\/javascript"></script>/mi'] = '';
GKParser::$customRules['/<script src="(.*?)media\/system\/js\/mootools-more.js" type="text\/javascript"></script>/mi'] = '';

I'd like to remove these lines, because my modules need it, but I don't know if there is a specic reason of these. Thank you and sorry if an Issue is a wrong way to ask it to you.

[dziudek]

Hi,

In general these scripts was removed due minifying the page size, so you can remove these rules if you need ;)