We use wp_enqueue_style() wordpress function and there are no params to implement your request. Btw we also enqueue just css with @font-face of Lato, Open-Sans font-families so we don’t connect those font-families in separate request on the site. http://prntscr.com/uwkhmq
And if you want to decrease Open-Sans and Lato font-families, please, deactivate option Default fonts in Theme Options
