tests: remove tests of UI notifications This commit is part of the removal of the UI notification feature from Kallithea, which is not deemed useful in its current form. Only email notifications are preserved.

{
  "name": "kallithea",
  "private": true,
  "dependencies": {
    "bootstrap": "3.3.7"
  },
  "devDependencies": {
    "less": "~2.7",
    "less-plugin-clean-css": "~1.5"
  }
}