Removed broken stylesheet link

devtools-grid/index.html

@@ -5,7 +5,6 @@
   <meta charset="UTF-8" />
   <meta name="viewport" content="width=device-width, initial-scale=1.0" />
   <title>Inspect CSS Grid</title>
-  <link rel="stylesheet" href="styles.css" />
   <link rel="icon" type="image/png" href="https://edgestatic.azureedge.net/welcome/static/favicon.png">
 
   <style>