irve

Вот в source страницы ее js код:

jQuery(function () {
      jQuery.scrollUp({
		// Element ID
        scrollName: 'scroll_to_up', 
		// Distance from top/bottom before showing element (px)
        scrollDistance: 359,
		// 'top' or 'bottom'
        scrollFrom: 'top',     
		// Speed back to top (ms)	
        scrollSpeed: 300, 
		// Scroll to top easing (see http://easings.net/)	
        easingType: 'linear',        
		// Fade, slide, none
        animation: 'fade',      
		// Animation speed (ms)	
        animationSpeed: 200,   
		// Text for element, can contain HTML
		
		scrollText: 'Scroll To Up',
		
        scrollTrigger: false,        // Set a custom triggering element. Can be an HTML string or jQuery object
        scrollTarget: false,         // Set a custom target element for scrolling to. Can be element or number
        scrollTitle: false,          // Set a custom <a> title if required.
        scrollImg: false,            // Set true to use image
        activeOverlay: false,        // Set CSS color to display scrollUp active point, e.g '#00FFFF'
        zIndex: 2147483647           // Z-Index for the overlay
    });
	
});

удалите его.

или добавьте в стили
#scroll_to_up {display: none}