service worker: Remove extraneous FetchEventPreloadHandle::New() call

content/browser/service_worker/service_worker_fetch_dispatcher.cc

Index: content/browser/service_worker/service_worker_fetch_dispatcher.cc
diff --git a/content/browser/service_worker/service_worker_fetch_dispatcher.cc b/content/browser/service_worker/service_worker_fetch_dispatcher.cc
index 4782c8fd7b55666314660c347c5412ba01f2a271..d29ae197aea07a15aa93600ad3a869c3bc213be4 100644
--- a/content/browser/service_worker/service_worker_fetch_dispatcher.cc
+++ b/content/browser/service_worker/service_worker_fetch_dispatcher.cc
@@ -542,8 +542,6 @@ bool ServiceWorkerFetchDispatcher::MaybeStartNavigationPreload(
       ResourceRequesterInfo::CreateForNavigationPreload(requester_info),
       mojo::MakeRequest(&url_loader_factory));
 
-  preload_handle_ = mojom::FetchEventPreloadHandle::New();
-
   ResourceRequest request;
   request.method = original_request->method();
   request.url = original_request->url();