chore: remove outdated comments that mention PublicKeys objects

Author: josefinalliende

lib/config/providers/auth_provider.dart

@@ -13,7 +13,7 @@ import 'package:whitenoise/utils/pubkey_formatter.dart';
 
 /// Auth Provider
 ///
-/// This provider manages authentication using the new PublicKey-based API.
+/// This provider manages authentication.
 class AuthNotifier extends Notifier<AuthState> {
   final _logger = Logger('AuthNotifier');
 

lib/config/providers/group_provider.dart

@@ -216,13 +216,11 @@ class GroupsNotifier extends Notifier<GroupsState> {
       final filteredMemberHexs =
           memberPublicKeyHexs.where((hex) => hex.trim() != creatorPubkeyHex).toList();
 
-      // Use hex strings directly instead of converting to PublicKey objects
       final filteredMemberPubkeys = filteredMemberHexs.map((hexKey) => hexKey.trim()).toList();
       _logger.info(
         'GroupsProvider: Members pubkeys loaded (excluding creator) - ${filteredMemberPubkeys.length}',
       );
 
-      // Use hex strings directly instead of converting to PublicKey objects
       final resolvedAdminPublicKeys =
           adminPublicKeyHexs.toSet().map((hexKey) => hexKey.trim()).toList();
       final combinedAdminKeys = {activePubkey, ...resolvedAdminPublicKeys}.toList();