Remove chrome/ code to handle App Notifications

chrome/test/data/page_cycler/cached_data_dir/Default/Preferences

 {
    "backup": {
       "_signature": "Vn7wWEcb0mHYD6HJ/aXPktHPIB/Urve7S9dPMC9c7gA=",
       "_version": 2,
       "browser": {
          "show_home_button": false
       },
       "extensions": {
          "ids": [ "ahfgeienlihckogmohjhadlkjgocpleb" ]
       },
@@ skipping 40 matching lines @@
    "extensions": {
       "autoupdate": {
          "next_check": "12978577341564299"
       },
       "chrome_url_overrides": {
          "bookmarks": [ "chrome-extension://eemcgdkfndhakfknompkggombfjjjeno/main.html" ]
       },
       "settings": {
          "ahfgeienlihckogmohjhadlkjgocpleb": {
             "active_permissions": {
-               "api": [ "appNotifications", "management", "webstorePrivate" ]
+               "api": [ "management", "webstorePrivate" ]
             },
             "app_launcher_ordinal": "n",
             "page_ordinal": "n"
          }
       }
    },
    "homepage": "",
    "homepage_is_newtabpage": true,
    "ntp": {
       "app_page_names": [ "Apps" ],
@@ skipping 19 matching lines @@
    "profile": {
       "avatar_index": 0,
       "content_settings": {
          "pref_version": 1
       },
       "created_by_version": "20.0.1098.0",
       "exited_cleanly": true,
       "name": "First user"
    }
 }