remove dead workflow parallel example

examples/Parallel Computing/Index.ipynb

@@ -321,24 +321,6 b''
      },
      "metadata": {},
      "output_type": "display_data"
-    },
-    {
-     "data": {
-      "text/html": [
-       "workflow/<br>\n",
-       "&nbsp;&nbsp;<a href='workflow/client.py' target='_blank'>client.py</a><br>\n",
-       "&nbsp;&nbsp;<a href='workflow/job_wrapper.py' target='_blank'>job_wrapper.py</a><br>\n",
-       "&nbsp;&nbsp;<a href='workflow/wmanager.py' target='_blank'>wmanager.py</a><br>"
-      ],
-      "text/plain": [
-       "workflow/\n",
-       "  client.py\n",
-       "  job_wrapper.py\n",
-       "  wmanager.py"
-      ]
-     },
-     "metadata": {},
-     "output_type": "display_data"
     }
    ],
    "source": [