Fix four duplicate properties.

plugins/c9.ide.ui/lib_apf.js

@@ -3953,9 +3953,6 @@ apf.extend(apf.config, {
     
     
     debug: false,
-    disableSpace: true,
-    allowSelect: false,
-    allowBlur: true,
     // initdelay: false,
       
     

plugins/c9.ide.ui/widgets.list.js

@@ -82,7 +82,6 @@ define(function(require, exports, module) {
                     scrollbarVisibilityChanged: acetree.renderer,
                     afterRender: acetree.renderer,
                     resize: acetree.renderer,
-                    afterRender: acetree.renderer,
                     expand: model,
                     collapse: model,
                     check: model,