App Manager - remove deprecated item.

source/advanced/app_manager.rst

@@ -1,13 +0,0 @@
-###################
-App Manager
-###################
-
-
-The App Manager has been removed and replaced with the Applications tool.
-
-
-.. image:: ../_static/images/advanced/fusionpbx_advanced_app_manager.jpg
-        :scale: 85%
-
-
-