diff --git a/packages/trace-viewer/src/sw.ts b/packages/trace-viewer/src/sw.ts
index 3edd36cdde..841056f457 100644
--- a/packages/trace-viewer/src/sw.ts
+++ b/packages/trace-viewer/src/sw.ts
@@ -159,7 +159,6 @@ function downloadHeadersForAttachment(traceModel: TraceModel, sha1: string): Hea
   if (!attachment)
     return;
   const headers = new Headers();
-  // Escape non-ascii characters and quotes.
   headers.set('Content-Disposition', `attachment; filename="attachment"; filename*=UTF-8''${encodeURIComponent(attachment.name)}`);
   if (attachment.contentType)
     headers.set('Content-Type', attachment.contentType);