[gnome-control-center] network: Remove unused function

[Georges Basile Stavracas Neto <gbsneto src gnome org>]

commit 1c4cf953d65993309acb33453369ecfdbd813400
Author: Robert Ancell <robert ancell canonical com>
Date:   Wed Nov 6 21:56:01 2019 +1300

    network: Remove unused function

 panels/network/connection-editor/vpn-helpers.c | 21 ---------------------
 panels/network/connection-editor/vpn-helpers.h |  2 --
 2 files changed, 23 deletions(-)
---
diff --git a/panels/network/connection-editor/vpn-helpers.c b/panels/network/connection-editor/vpn-helpers.c
index 6ed8791bb..8ef486bb9 100644
--- a/panels/network/connection-editor/vpn-helpers.c
+++ b/panels/network/connection-editor/vpn-helpers.c
@@ -316,24 +316,3 @@ vpn_export (NMConnection *connection)
        gtk_widget_show_all (dialog);
        gtk_window_present (GTK_WINDOW (dialog));
 }
-
-gboolean
-vpn_supports_ipv6 (NMConnection *connection)
-{
-       NMSettingVpn *s_vpn;
-       const char *service_type;
-       NMVpnEditorPlugin *plugin;
-       guint32 capabilities;
-
-       s_vpn = nm_connection_get_setting_vpn (connection);
-       g_return_val_if_fail (s_vpn != NULL, FALSE);
-
-       service_type = nm_setting_vpn_get_service_type (s_vpn);
-       g_return_val_if_fail (service_type != NULL, FALSE);
-
-       plugin = vpn_get_plugin_by_service (service_type);
-       g_return_val_if_fail (plugin != NULL, FALSE);
-
-       capabilities = nm_vpn_editor_plugin_get_capabilities (plugin);
-       return (capabilities & NM_VPN_EDITOR_PLUGIN_CAPABILITY_IPV6) != 0;
-}
diff --git a/panels/network/connection-editor/vpn-helpers.h b/panels/network/connection-editor/vpn-helpers.h
index 6bd102c5d..578f68ce6 100644
--- a/panels/network/connection-editor/vpn-helpers.h
+++ b/panels/network/connection-editor/vpn-helpers.h
@@ -36,6 +36,4 @@ void vpn_import (GtkWindow *parent, VpnImportCallback callback, gpointer user_da
 
 void vpn_export (NMConnection *connection);
 
-gboolean vpn_supports_ipv6 (NMConnection *connection);
-
 #endif  /* _VPN_HELPERS_H_ */