Remove unused variable / function

src/components/structures/RoomDirectory.js

@@ -68,7 +68,6 @@ module.exports = React.createClass({
         this.filterString = null;
         this.filterTimeout = null;
         this.scrollPanel = null;
-        this.searchBox = null;
 
         // dis.dispatch({
         //     action: 'ui_opacity',
@@ -245,10 +244,6 @@ module.exports = React.createClass({
         this.showRoomAlias(alias);
     },
 
-    collectSearchBox: function(e) {
-        this.searchBox = e;
-    },
-
     showRoomAlias: function(alias) {
         this.showRoom(null, alias);
     },