[EGD-6019] Revert of two commits

This reverts commit b6416b15da.
This reverts commit e2f3882d8a.

module-apps/application-desktop/ApplicationDesktop.cpp

@@ -383,6 +383,8 @@ namespace app
 
     sys::ReturnCodes ApplicationDesktop::DeinitHandler()
     {
+        LOG_INFO("DeinitHandler");
+        settings->unregisterValueChange();
         return sys::ReturnCodes::Success;
     }