Eliminate unnecessary forward declarations from components/password_manager

components/password_manager/core/browser/password_store.h

Index: components/password_manager/core/browser/password_store.h
diff --git a/components/password_manager/core/browser/password_store.h b/components/password_manager/core/browser/password_store.h
index 0b943f45a9776aa1d5634e1b036bf471df3099e0..752fb150181e6d7ed55c90ccbac0d22759be5734 100644
--- a/components/password_manager/core/browser/password_store.h
+++ b/components/password_manager/core/browser/password_store.h
@@ -25,13 +25,6 @@ namespace autofill {
 struct PasswordForm;
 }
 
-namespace browser_sync {
-class PasswordChangeProcessor;
-class PasswordDataTypeController;
-class PasswordModelAssociator;
-class PasswordModelWorker;
-}
-
 namespace password_manager {
 class PasswordStore;
 }  // namespace password_manager