[Plugin: kk Star Ratings] Remove style from head

how can i remove the following code from the head of my site? i have not found in header.php

<style>.kk-star-ratings { width:75px; }.kk-star-ratings .kksr-stars a { width:15px; }.kk-star-ratings .kksr-stars, .kk-star-ratings .kksr-stars .kksr-fuel, .kk-star-ratings .kksr-stars a { height:15px; }.kk-star-ratings .kksr-star.gray { background-image: url(https://phoenix986.altervista.org/wp/wp-content/uploads/2013/03/gray.png); }.kk-star-ratings .kksr-star.yellow { background-image: url(https://phoenix986.altervista.org/wp/wp-content/uploads/2013/03/yellow.png); }.kk-star-ratings .kksr-star.orange { background-image: url(https://phoenix986.altervista.org/wp/wp-content/uploads/2013/03/orange.png); }</style>