Remove obsolete comment about COEP support for respondWith

This has already been implemented but the comment is left.

TBR=falken@chromium.org

Bug: 999049
Change-Id: I7359619e74b1d23f48fbc3e21f7f21c293a63457
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1942889Reviewed-by: Makoto Shimazu <shimazu@chromium.org>
Commit-Queue: Makoto Shimazu <shimazu@chromium.org>
Cr-Commit-Position: refs/heads/master@{#720126}

third_party/blink/renderer/modules/service_worker/service_worker_global_scope.cc

@@ -1437,9 +1437,6 @@ void ServiceWorkerGlobalScope::DispatchFetchEventForSubresource(
                "ServiceWorkerGlobalScope::DispatchFetchEventForSubresource",
                "url", params->request->url.ElidedString().Utf8(), "queued",
                RequestedTermination() ? "true" : "false");
-  // TODO(https://crbug.com/999049): Retrieve the COEP value from
-  // controller_receivers_.current_context() and respect it on the corresponding
-  // respondWith().
   network::mojom::blink::CrossOriginEmbedderPolicy requestor_coep =
       controller_receivers_.current_context();
   if (RequestedTermination()) {