Deactivation of link for Logo in header

i think you have to edit in function-set-avia-frontend.php (framework folder/php/) some lines!
here you can see the avia_logo funktion is defined:

if(!function_exists('avia_logo'))
{
	/**
	 * return the logo of the theme. if a logo was uploaded and set at the backend options panel display it
	 * otherwise display the logo file linked in the css file for the .bg-logo class
	 * @return string the logo + url
	 */
	function avia_logo($use_image = "", $sub = "", $headline_type = "h1", $dimension = "")
	{
		$use_image 		= apply_filters('avf_logo', $use_image);
		$headline_type 	= apply_filters('avf_logo_headline', $headline_type);
		$sub 			= apply_filters('avf_logo_subtext',  $sub);
		$alt 			= apply_filters('avf_logo_alt', get_bloginfo('name'));
		$link 			= apply_filters('avf_logo_link', home_url('/'));
		
		if($sub) $sub = "<span class='subtext'>$sub</span>";
		if($dimension === true) $dimension = "height='100' width='300'"; //basically just for better page speed ranking :P

		if($logo = avia_get_option('logo'))
		{
			 $logo = apply_filters('avf_logo', $logo);
			 $logo = "<img {$dimension} src='{$logo}' alt='{$alt}' />";
			 $logo = "<$headline_type class='logo'><a href='".$link."'>".$logo."$sub</a></$headline_type>";
		}
		else
		{
			$logo = get_bloginfo('name');
			if($use_image) $logo = "<img {$dimension} src='{$use_image}' alt='{$alt}' title='{$logo}'/>";
			$logo = "<$headline_type class='logo bg-logo'><a href='".$link."'>".$logo."$sub</a></$headline_type>";
		}
		
		$logo = apply_filters('avf_logo_final_output', $logo, $use_image, $headline_type, $sub, $alt, $link);

		return $logo;
	}
}

but please don’t ask me how to do it best