Remove unused code

Closes: #1105

damus/Models/Contacts.swift

@@ -56,12 +56,6 @@ class Contacts {
         }
     }
     
-    func get_friendosphere() -> [String] {
-        var fs = get_friend_list()
-        fs.append(contentsOf: get_friend_of_friend_list())
-        return fs
-    }
-    
     func remove_friend(_ pubkey: String) {
         friends.remove(pubkey)
     }
@@ -70,10 +64,6 @@ class Contacts {
         return Array(friends)
     }
     
-    func get_friend_of_friend_list() -> [String] {
-        return Array(friend_of_friends)
-    }
-    
     func add_friend_pubkey(_ pubkey: String) {
         friends.insert(pubkey)
     }
@@ -108,24 +98,6 @@ class Contacts {
     }
 }
 
-
-func create_contacts(relays: [RelayDescriptor], our_pubkey: String, follow: ReferencedId) -> NostrEvent {
-    let kind = NostrKind.contacts.rawValue
-    let content = create_contacts_content(relays) ?? "{}"
-    let tags = [refid_to_tag(follow)]
-    return NostrEvent(content: content, pubkey: our_pubkey, kind: kind, tags: tags)
-}
-
-func create_contacts_content(_ relays: [RelayDescriptor]) -> String? {
-    // TODO: just create a new one of this is corrupted?
-    let crelays = make_contact_relays(relays)
-    guard let encoded = encode_json(crelays) else {
-        return nil
-    }
-    return encoded
-}
-
-
 func follow_user(pool: RelayPool, our_contacts: NostrEvent?, pubkey: String, privkey: String, follow: ReferencedId) -> NostrEvent? {
     guard let ev = follow_user_event(our_contacts: our_contacts, our_pubkey: pubkey, follow: follow) else {
         return nil
@@ -245,37 +217,3 @@ func make_contact_relays(_ relays: [RelayDescriptor]) -> [String: RelayInfo] {
         acc[relay.url.url.absoluteString] = relay.info
     }
 }
-
-// TODO: tests for this
-func is_friend_event(_ ev: NostrEvent, keypair: Keypair, contacts: Contacts) -> Bool
-{
-    if !contacts.is_friend(ev.pubkey) {
-        return false
-    }
-    
-    if ev.is_reply(keypair.privkey) {
-        return true
-    }
-    
-    let pks = get_referenced_id_set(tags: ev.tags, key: "p")
-    
-    // reply to self
-    if pks.count == 0 {
-        return true
-    }
-    
-    // allow reply-to-self-or-friend case
-    if pks.count == 1 && contacts.is_friend(pks.first!.ref_id) {
-        return true
-    }
-    
-    // show our replies?
-    for pk in pks {
-        // don't count self mentions here
-        if pk.ref_id != ev.pubkey && contacts.is_friend(pk.ref_id) {
-            return true
-        }
-    }
-    
-    return false
-}