[gnome-software] trivial: Remove unused prototype

[Kalev Lember <klember src gnome org>]

commit d084f8f2c29baf079eb8903616cfdafbd05cd6ee
Author: Kalev Lember <klember redhat com>
Date:   Fri Sep 28 11:15:14 2018 +0100

    trivial: Remove unused prototype

 src/gs-app-row.h | 2 --
 1 file changed, 2 deletions(-)
---
diff --git a/src/gs-app-row.h b/src/gs-app-row.h
index 035555f9..b6c3e697 100644
--- a/src/gs-app-row.h
+++ b/src/gs-app-row.h
@@ -49,8 +49,6 @@ void           gs_app_row_set_show_folders            (GsAppRow       *app_row,
                                                         gboolean        show_folders);
 void            gs_app_row_set_show_buttons            (GsAppRow       *app_row,
                                                         gboolean        show_buttons);
-void            gs_app_row_set_show_sandbox            (GsAppRow       *app_row,
-                                                        gboolean        show_sandbox);
 void            gs_app_row_set_show_source             (GsAppRow       *app_row,
                                                         gboolean        show_source);
 void            gs_app_row_set_show_update             (GsAppRow       *app_row,