profile: remove deleted flag

it's not used anymore

damus/Nostr/Nostr.swift

@@ -79,11 +79,6 @@ class Profile: Codable {
         set(s) { set_val("reactions", s) }
     }
     
-    var deleted: Bool? {
-        get { return get_val("deleted"); }
-        set(s) { set_val("deleted", s) }
-    }
-    
     var display_name: String? {
         get { return str("display_name"); }
         set(s) { set_str("display_name", s) }

damus/Util/AccountDeletion.swift

@@ -10,7 +10,6 @@ import Foundation
 
 func created_deleted_account_profile(keypair: FullKeypair) -> NostrEvent? {
     let profile = Profile()
-    profile.deleted = true
     profile.about = "account deleted"
     profile.name = "nobody"