remove unnecessary override

app/lib/features/geckoview/domain/entities/browser_icon.dart

@@ -32,9 +32,6 @@ class BrowserIcon with FastEquatable {
     required this.source,
   });
 
-  @override
-  bool get cacheHash => true;
-
   @override
   List<Object?> get hashParameters => [image, dominantColor, source];
 }

app/lib/features/geckoview/domain/entities/states/find_result.dart

@@ -23,7 +23,4 @@ class FindResultState with FastEquatable {
     numberOfMatches,
     isDoneCounting,
   ];
-
-  @override
-  bool get cacheHash => true;
 }

app/lib/features/geckoview/domain/entities/states/history.dart

@@ -6,9 +6,6 @@ class HistoryItem with FastEquatable {
 
   HistoryItem({required this.url, required this.title});
 
-  @override
-  bool get cacheHash => true;
-
   @override
   List<Object?> get hashParameters => [url, title];
 }
@@ -34,9 +31,6 @@ class HistoryState with FastEquatable {
     canGoForward: false,
   );
 
-  @override
-  bool get cacheHash => true;
-
   @override
   List<Object?> get hashParameters => [
     items,

app/lib/features/geckoview/domain/entities/states/readerable.dart

@@ -10,9 +10,6 @@ class ReaderableState with FastEquatable {
   factory ReaderableState.$default() =>
       ReaderableState(readerable: false, active: false);
 
-  @override
-  bool get cacheHash => true;
-
   @override
   List<Object?> get hashParameters => [readerable, active];
 }

app/lib/features/geckoview/domain/entities/states/security.dart

@@ -14,9 +14,6 @@ class SecurityState with FastEquatable {
   factory SecurityState.$default() =>
       SecurityState(secure: false, host: "", issuer: "");
 
-  @override
-  bool get cacheHash => true;
-
   @override
   List<Object?> get hashParameters => [secure, host, issuer];
 }

app/lib/features/geckoview/domain/entities/states/tab.dart

@@ -79,9 +79,6 @@ class TabState extends WebPageInfo {
     findResultState: FindResultState.$default(),
   );
 
-  @override
-  bool get cacheHash => true;
-
   @override
   List<Object?> get hashParameters => [
     ...super.hashParameters,

app/lib/features/geckoview/domain/entities/states/web_extension.dart

@@ -28,9 +28,6 @@ class WebExtensionState with FastEquatable {
     this.icon,
   });
 
-  @override
-  bool get cacheHash => true;
-
   @override
   List<Object?> get hashParameters => [
     extensionId,