removed unused code

lib/models/subscription.dart

@@ -1,7 +1,5 @@
 // @dart=2.9
 
-import 'dart:convert';
-
 const freeProductID = "free";
 const stripe = "stripe";
 const appStore = "appstore";
@@ -38,44 +36,6 @@ class Subscription {
     return 'year' == period;
   }
 
-  Subscription copyWith({
-    int id,
-    String productID,
-    int storage,
-    String originalTransactionID,
-    String paymentProvider,
-    int expiryTime,
-    String price,
-    String period,
-  }) {
-    return Subscription(
-      id: id ?? this.id,
-      productID: productID ?? this.productID,
-      storage: storage ?? this.storage,
-      originalTransactionID:
-          originalTransactionID ?? this.originalTransactionID,
-      paymentProvider: paymentProvider ?? this.paymentProvider,
-      expiryTime: expiryTime ?? this.expiryTime,
-      price: price ?? this.price,
-      period: period ?? this.period,
-    );
-  }
-
-  Map<String, dynamic> toMap() {
-    final map = <String, dynamic>{
-      'id': id,
-      'productID': productID,
-      'storage': storage,
-      'originalTransactionID': originalTransactionID,
-      'paymentProvider': paymentProvider,
-      'expiryTime': expiryTime,
-      'price': price,
-      'period': period,
-      'attributes': attributes?.toJson()
-    };
-    return map;
-  }
-
   factory Subscription.fromMap(Map<String, dynamic> map) {
     if (map == null) return null;
     return Subscription(
@@ -92,43 +52,6 @@ class Subscription {
           : null,
     );
   }
-
-  String toJson() => json.encode(toMap());
-
-  factory Subscription.fromJson(String source) =>
-      Subscription.fromMap(json.decode(source));
-
-  @override
-  String toString() {
-    return 'Subscription{id: $id, productID: $productID, storage: $storage, originalTransactionID: $originalTransactionID, paymentProvider: $paymentProvider, expiryTime: $expiryTime, price: $price, period: $period, attributes: $attributes}';
-  }
-
-  @override
-  bool operator ==(Object o) {
-    if (identical(this, o)) return true;
-
-    return o is Subscription &&
-        o.id == id &&
-        o.productID == productID &&
-        o.storage == storage &&
-        o.originalTransactionID == originalTransactionID &&
-        o.paymentProvider == paymentProvider &&
-        o.expiryTime == expiryTime &&
-        o.price == price &&
-        o.period == period;
-  }
-
-  @override
-  int get hashCode {
-    return id.hashCode ^
-        productID.hashCode ^
-        storage.hashCode ^
-        originalTransactionID.hashCode ^
-        paymentProvider.hashCode ^
-        expiryTime.hashCode ^
-        price.hashCode ^
-        period.hashCode;
-  }
 }
 
 class Attributes {
@@ -144,16 +67,4 @@ class Attributes {
     isCancelled = json["isCancelled"];
     customerID = json["customerID"];
   }
-
-  Map<String, dynamic> toJson() {
-    final map = <String, dynamic>{};
-    map["isCancelled"] = isCancelled;
-    map["customerID"] = customerID;
-    return map;
-  }
-
-  @override
-  String toString() {
-    return 'Attributes{isCancelled: $isCancelled, customerID: $customerID}';
-  }
 }