unused css class removed

frontend-js/src/main/css/global.css

@@ -230,15 +230,6 @@
     border: none
 }
 
-.chkbox {
-    width: 16px;
-    height: 16px;
-    display: inline-block;
-    -moz-border-radius: 0px;
-    -webkit-border-radius: 0px;
-    border-radius: 0px;
-}
-
 .result-table {
     width: 100%;
     border-spacing: 2px;