Removing old prefs storage for BudgetManager

chrome/browser/budget_service/budget_manager.h

Index: chrome/browser/budget_service/budget_manager.h
diff --git a/chrome/browser/budget_service/budget_manager.h b/chrome/browser/budget_service/budget_manager.h
index 0f09631f7e8e5d253fb9ae0a2cb7209f6f90def1..708648f83518952889eefe4ecc7489c96fb934be 100644
--- a/chrome/browser/budget_service/budget_manager.h
+++ b/chrome/browser/budget_service/budget_manager.h
@@ -16,10 +16,6 @@
 
 class Profile;
 
-namespace user_prefs {
-class PrefRegistrySyncable;
-}
-
 namespace url {
 class Origin;
 }
@@ -33,8 +29,6 @@ class BudgetManager : public KeyedService {
   explicit BudgetManager(Profile* profile);
   ~BudgetManager() override;
 
-  static void RegisterProfilePrefs(user_prefs::PrefRegistrySyncable* registry);
-
   // Query for the base cost for any background processing.
   static double GetCost(blink::mojom::BudgetOperationType type);