diff --git a/src/main/scala/gitbucket/core/servlet/PluginAssetsServlet.scala b/src/main/scala/gitbucket/core/servlet/PluginAssetsServlet.scala
index c9c8acf..92ab888 100644
--- a/src/main/scala/gitbucket/core/servlet/PluginAssetsServlet.scala
+++ b/src/main/scala/gitbucket/core/servlet/PluginAssetsServlet.scala
@@ -31,7 +31,6 @@
                     val bytes = IOUtils.toByteArray(in)
                     resp.setContentLength(bytes.length)
                     resp.setContentType(FileUtil.getMimeType(path, bytes))
-                    //resp.setDateHeader("Last-Modified", lastModified)
                     resp.setHeader("ETag", etag)
                     resp.getOutputStream.write(bytes)
                   } finally {