Remove libappindicator support.

Index: src/gromit-mpx.c
--- src/gromit-mpx.c.orig
+++ src/gromit-mpx.c
@@ -887,17 +887,6 @@ void setup_main_app (GromitData *data, gboolean activa
   if (activate)
     acquire_grab (data, NULL); /* grab all */
 
-  /* 
-     TRAY ICON
-  */
-  data->trayicon = app_indicator_new (PACKAGE_NAME,
-				      PACKAGE_NAME,
-				      APP_INDICATOR_CATEGORY_APPLICATION_STATUS);
-
-  app_indicator_set_status (data->trayicon, APP_INDICATOR_STATUS_ACTIVE);
-
-
-
   /* create the menu */
   GtkWidget *menu = gtk_menu_new ();
 
@@ -997,9 +986,6 @@ void setup_main_app (GromitData *data, gboolean activa
   gtk_widget_show (intro_item);
   gtk_widget_show (about_item);
   gtk_widget_show (quit_item);
-
-
-  app_indicator_set_menu (data->trayicon, GTK_MENU(menu));
 
   if(data->show_intro_on_startup)
       on_intro(NULL, data);