Revert of Evict Service Worker when reading it from disk cache fails.

content/browser/service_worker/service_worker_registration.h

Index: content/browser/service_worker/service_worker_registration.h
diff --git a/content/browser/service_worker/service_worker_registration.h b/content/browser/service_worker/service_worker_registration.h
index 98569e081b29490b162bb7373a97c90f61d0a9a2..3a7740b2283ab9cfecdd0ba8890f1b9bba8801fe 100644
--- a/content/browser/service_worker/service_worker_registration.h
+++ b/content/browser/service_worker/service_worker_registration.h
@@ -137,10 +137,6 @@
   void ClearUserData(const std::string& key,
                      const StatusCallback& callback);
 
-  // Unsets the version and deletes its resources. Also deletes this
-  // registration from storage if there is no longer a stored version.
-  void DeleteVersion(const scoped_refptr<ServiceWorkerVersion>& version);
-
  private:
   friend class base::RefCounted<ServiceWorkerRegistration>;