Remove unused polyfill

Only needed by ios versions we don't support anymore

client/src/standalone/videos/embed.html

@@ -6,19 +6,6 @@
     <meta name="robots" content="noindex">
     <meta property="og:platform" content="PeerTube" />
 
-    <script type="text/javascript">
-    // Thanks: https://mathiasbynens.be/notes/globalthis
-    (function() {
-      if (typeof globalThis === 'object') return;
-      Object.prototype.__defineGetter__('__magic__', function() {
-        return this;
-      });
-      __magic__.globalThis = __magic__
-      delete Object.prototype.__magic__;
-    }());
-    </script>
-
-
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