docs: remove stylesheet

Author: mattlewis92

src/index.html

@@ -8,10 +8,6 @@
       rel="stylesheet"
       href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css"
     />
-    <link
-      rel="stylesheet"
-      href="https://cdnjs.cloudflare.com/ajax/libs/github-fork-ribbon-css/0.2.3/gh-fork-ribbon.min.css"
-    />
     <title>angular 20.0+ drag and drop</title>
     <link rel="icon" type="image/x-icon" href="favicon.ico" />
   </head>