[refactor,util][xs]: remove remaining code in util.js as not used anywhere (position and $.fn.serializeObject).

src/util.js

@@ -1,36 +1,2 @@
 /*jshint multistr:true */
 
-var util = function() {
-  $.fn.serializeObject = function() {
-    var o = {};
-    var a = this.serializeArray();
-    $.each(a, function() {
-      if (o[this.name]) {
-        if (!o[this.name].push) {
-          o[this.name] = [o[this.name]];
-        }
-        o[this.name].push(this.value || '');
-      } else {
-        o[this.name] = this.value || '';
-      }
-    });
-    return o;
-  };
-
-  function position( thing, elem, offset ) {
-    var position = $(elem.target).position();
-    if (offset) {
-      if (offset.top) position.top += offset.top;
-      if (offset.left) position.left += offset.left;
-    }
-    $('.' + thing + '-overlay').show().click(function(e) {
-      $(e.target).hide();
-      $('.' + thing).hide();
-    });
-    $('.' + thing).show().css({top: position.top + $(elem.target).height(), left: position.left});
-  }
-
-  return {
-    position: position
-  };
-}();