Update index.html

test/index.html

@@ -4,7 +4,6 @@
     <meta charset="utf-8" />
     <title>Mocha Tests</title>
     <link href="https://unpkg.com/mocha@5.2.0/mocha.css" rel="stylesheet" />
-    <link href="../dist/artplayer.css" rel="stylesheet" />
     <style>
         .artplayer-app {
             display: flex;