shell: Drop obsolete po globs

The Python bridge has never implemented them. These now just cause a lot
of 404 error message noise when starting a Cockpit session.

pkg/shell/index.html

@@ -8,9 +8,6 @@
     <link href="../../static/branding.css" rel="stylesheet" />
     <script src="../base1/cockpit.js"></script>
     <script src="../manifests.js"></script>
-    <!-- HACK: C bridge loads translations via glob and Python via manifest.js -->
-    <script src="../*/po.manifest.js"></script>
-    <script src="../*/po.js"></script>
     <script src="po.js"></script>
     <script src="shell.js"></script>
   </head>