Refactor how the updater state data is serialized in update checks.

components/component_updater/component_updater_service_internal.h

Index: components/component_updater/component_updater_service_internal.h
diff --git a/components/component_updater/component_updater_service_internal.h b/components/component_updater/component_updater_service_internal.h
index d8776cb3048fe0e11af15584138fd4b8bd74b144..f25bbc973ef2bc3c97949d1ead8ba3749cb05d0a 100644
--- a/components/component_updater/component_updater_service_internal.h
+++ b/components/component_updater/component_updater_service_internal.h
@@ -84,12 +84,6 @@ class CrxUpdateService : public ComponentUpdateService,
                         const base::TimeTicks& start_time,
                         update_client::Error error);
 
-  // Returns the map of installer attributes for the recovery component
-  // installer. This data corresponds to the Omaha updater state and it is
-  // serialized as part of the update check for the recovery component.
-  update_client::InstallerAttributes
-  GetInstallerAttributesForRecoveryComponentInstaller(
-      const CrxComponent& crx_component) const;
   base::ThreadChecker thread_checker_;
 
   scoped_refptr<Configurator> config_;