[gnome-contacts] ContactsContact: remove unused method is_callable.

[Niels De Graef <nielsdg src gnome org>]

commit ce2f8dfd8e22e2adb54099335fcfdc86be51bb71
Author: Niels De Graef <nielsdegraef gmail com>
Date:   Sun Dec 24 09:59:23 2017 +0100

    ContactsContact: remove unused method is_callable.

 src/contacts-contact.vala |   12 ------------
 1 files changed, 0 insertions(+), 12 deletions(-)
---
diff --git a/src/contacts-contact.vala b/src/contacts-contact.vala
index 186802e..ae0604e 100644
--- a/src/contacts-contact.vala
+++ b/src/contacts-contact.vala
@@ -993,18 +993,6 @@ public class Contacts.Contact : GLib.Object  {
     return null;
   }
 
-  public Account? is_callable (string proto, string id) {
-    Tpf.Persona? t_persona = this.find_im_persona (proto, id);
-    if (t_persona != null && t_persona.contact != null) {
-      unowned TelepathyGLib.Capabilities caps =
-      t_persona.contact.get_capabilities ();
-      if (caps.supports_audio_call (TelepathyGLib.HandleType.CONTACT))
-             return (t_persona.store as Tpf.PersonaStore).account;
-    }
-
-    return null;
-  }
-
   public static async Persona? create_primary_persona_for_details (Folks.PersonaStore store, 
HashTable<string, Value?> details) throws GLib.Error {
     var p = yield store.add_persona_from_details (details);
     return p;