hide_regiones_cart_jumpseller.liquid

 <script type="text/javascript">
   var shipping_to = ["12","03"]; //hides all regiones not included in this array
   setTimeout(function(){ 
     $('#estimate_shipping_region option').filter(function() {
       return $.inArray($.trim($(this).val()), shipping_to) == -1;
     }).remove();

   }, 1000);
   $("#estimate_shipping_region").change();
</script>