Remove unused appIcon from PHUIListItemView

Summary: This is unused and there's no way to even set it. Pretty sure it died a while ago when we switched app icons to FontAwesome.

Test Plan: Grepped for `appIcon`, found no related hits. Browsed some pages.

Reviewers: chad

Reviewed By: chad

Differential Revision: https://secure.phabricator.com/D15074

src/view/phui/PHUIListItemView.php

@@ -19,7 +19,6 @@ final class PHUIListItemView extends AphrontTagView {
   private $isExternal;
   private $key;
   private $icon;
-  private $appIcon;
   private $selected;
   private $disabled;
   private $renderNameAsTooltip;
@@ -179,7 +178,7 @@ final class PHUIListItemView extends AphrontTagView {
     $classes[] = 'phui-list-item-view';
     $classes[] = 'phui-list-item-'.$this->type;
 
-    if ($this->icon || $this->appIcon) {
+    if ($this->icon) {
       $classes[] = 'phui-list-item-has-icon';
     }
 
@@ -279,12 +278,6 @@ final class PHUIListItemView extends AphrontTagView {
         ->setImage($this->profileImage);
     }
 
-    if ($this->appIcon) {
-      $icon = id(new PHUIIconView())
-        ->addClass('phui-list-item-icon')
-        ->setIconFont($this->appIcon);
-    }
-
     $classes = array();
     if ($this->href) {
       $classes[] = 'phui-list-item-href';