chore: remove unused code

Author: josefinalliende

lib/domain/models/contact_model.dart

@@ -1,6 +1,5 @@
 // ignore_for_file: public_member_api_docs, sort_constructors_first
 import 'package:whitenoise/src/rust/api/metadata.dart' show FlutterMetadata;
-import 'package:whitenoise/src/rust/api/users.dart' show User;
 import 'package:whitenoise/utils/public_key_validation_extension.dart';
 
 class ContactModel {
@@ -47,28 +46,6 @@ class ContactModel {
     );
   }
 
-  factory ContactModel.fromUser({
-    required User user,
-  }) {
-    final metadata = user.metadata;
-    final displayName = _sanitizeString(metadata.displayName);
-    final about = _sanitizeString(metadata.about);
-    final website = _sanitizeUrl(metadata.website);
-    final nip05 = _sanitizeString(metadata.nip05);
-    final lud16 = _sanitizeString(metadata.lud16);
-    final picture = _sanitizeUrl(metadata.picture);
-
-    return ContactModel(
-      displayName: displayName.isNotEmpty ? displayName : 'Unknown User',
-      publicKey: user.pubkey,
-      imagePath: picture,
-      about: about,
-      website: website,
-      nip05: nip05,
-      lud16: lud16,
-    );
-  }
-
   // Helper method to sanitize strings
   static String _sanitizeString(String? input) {
     if (input == null) return '';