Removing PDF Generation as it is not supported

Author: v-alje

.openpublishing.publish.config.json

@@ -246,25 +246,6 @@
       "branch": "master",
       "branch_mapping": {}
     },
-    {
-      "path_to_root": "_themes.pdf",
-      "url": "https://github.com/Microsoft/templates.docs.msft.pdf",
-      "branch": "master",
-      "branch_mapping": {}
-    }
-  ],
-  "branch_target_mapping": {
-    "live": [
-      "Publish",
-      "Pdf"
-    ]
-  },
-  "need_generate_pdf_url_template": true,
-  "targets": {
-    "Pdf": {
-      "template_folder": "_themes.pdf"
-    }
-  },
   "need_generate_intellisense": false,
   "enable_incremental_build": false,
   "dependent_packages": [