#ctl00_ContentPlaceHolder1_gvEvaluaciones thead tr th:last-child, #ctl00_ContentPlaceHolder1_gvEvaluaciones thead tr th:nth-last-child(2),
#ctl00_ContentPlaceHolder1_gvEvaluaciones tbody tr:not(.child) td:last-child, #ctl00_ContentPlaceHolder1_gvEvaluaciones tbody tr:not(.child) td:nth-last-child(2) {
    display: none !important;
}