remove missed manual Application instance constructions

apps/accessibility/appinfo/app.php

apps/cloud_federation_api/appinfo/app.php

apps/federatedfilesharing/appinfo/app.php

apps/files_sharing/appinfo/app.php

apps/lookup_server_connector/appinfo/app.php

apps/sharebymail/appinfo/app.php

apps/systemtags/appinfo/app.php

apps/theming/appinfo/app.php

apps/theming/lib/AppInfo/Application.php

apps/twofactor_backupcodes/appinfo/app.php

apps/updatenotification/appinfo/app.php

apps/workflowengine/appinfo/app.php