Remove unused model

mobile/lib/face/db_model_mappers.dart

@@ -25,17 +25,6 @@ bool sqlIntToBool(int? value, {bool defaultValue = false}) {
   }
 }
 
-Map<String, dynamic> mapToFaceDB(PersonFace personFace) {
-  return {
-    faceIDColumn: personFace.face.faceID,
-    faceDetectionColumn: json.encode(personFace.face.detection.toJson()),
-    faceConfirmedColumn: boolToSQLInt(personFace.confirmed),
-    faceClusterId: personFace.personID,
-    faceClosestDistColumn: personFace.closeDist,
-    faceClosestFaceID: personFace.closeFaceID,
-  };
-}
-
 Map<String, dynamic> mapPersonToRow(Person p) {
   return {
     idColumn: p.remoteID,

mobile/lib/face/model/person_face.dart

@@ -1,37 +0,0 @@
-import 'package:photos/face/model/face.dart';
-
-class PersonFace {
-  final Face face;
-  int? personID;
-  bool? confirmed;
-  double? closeDist;
-  String? closeFaceID;
-
-  PersonFace(
-    this.face,
-    this.personID,
-    this.closeDist,
-    this.closeFaceID, {
-    this.confirmed,
-  });
-
-  // toJson
-  Map<String, dynamic> toJson() => {
-        'face': face.toJson(),
-        'personID': personID,
-        'confirmed': confirmed ?? false,
-        'close_dist': closeDist,
-        'close_face_id': closeFaceID,
-      };
-
-  // fromJson
-  factory PersonFace.fromJson(Map<String, dynamic> json) {
-    return PersonFace(
-      Face.fromJson(json['face'] as Map<String, dynamic>),
-      json['personID'] as int?,
-      json['close_dist'] as double?,
-      json['close_face_id'] as String?,
-      confirmed: json['confirmed'] as bool?,
-    );
-  }
-}