Update index.rst to remove direct DConf access

Direct DConf access is not necessary anymore in most cases.
Ref: http://docs.flatpak.org/en/latest/sandbox-permissions.html#dconf-access

Apps/Guides/Permissions/index.rst

@@ -33,9 +33,6 @@ Feature                                 Flatpak Permissions
 ======================================= ================================================
 Display a graphical user interface      ``--socket=wayland``
 Access the Internet using sockets       ``--share=network``
-Access settings (GNOME applications)    ``--filesystem=~/.config/dconf:ro`` |br|
-                                        ``--talk-name=ca.desrt.dconf`` |br|
-                                        ``--env=DCONF_USER_CONFIG_DIR=.config/dconf``
 Access Bluetooth devices                ``--allow=bluetooth``
 Read and write user's documents         ``--xdg-documents``
 Read and write user's downloads         ``--xdg-download``