search: switch to nostrdb profile searching

Changelog-Changed: Switch to nostrdb for @'s and user search

damus/Models/DamusState.swift

@@ -31,7 +31,6 @@ struct DamusState {
     let muted_threads: MutedThreadsManager
     let wallet: WalletModel
     let nav: NavigationCoordinator
-    let user_search_cache: UserSearchCache
     let music: MusicController?
     let video: VideoController
     let ndb: Ndb
@@ -62,7 +61,6 @@ struct DamusState {
     }
     
     static var empty: DamusState {
-        let user_search_cache = UserSearchCache()
         let empty_pub: Pubkey = .empty
         let empty_sec: Privkey = .empty
         let kp = Keypair(pubkey: empty_pub, privkey: nil)
@@ -73,7 +71,7 @@ struct DamusState {
             likes: EventCounter(our_pubkey: empty_pub),
             boosts: EventCounter(our_pubkey: empty_pub),
             contacts: Contacts(our_pubkey: empty_pub),
-            profiles: Profiles(user_search_cache: user_search_cache, ndb: .empty),
+            profiles: Profiles(ndb: .empty),
             dms: DirectMessagesModel(our_pubkey: empty_pub),
             previews: PreviewCache(),
             zaps: Zaps(our_pubkey: empty_pub),
@@ -90,7 +88,6 @@ struct DamusState {
             muted_threads: MutedThreadsManager(keypair: kp),
             wallet: WalletModel(settings: UserSettingsStore()),
             nav: NavigationCoordinator(),
-            user_search_cache: user_search_cache,
             music: nil,
             video: VideoController(),
             ndb: .empty

damus/Models/HomeModel.swift

@@ -734,8 +734,6 @@ func load_our_contacts(state: DamusState, m_old_ev: NostrEvent?, ev: NostrEvent)
             }
         }
     }
-
-    state.user_search_cache.updateOwnContactsPetnames(id: contacts.our_pubkey, oldEvent: m_old_ev, newEvent: ev)
 }