Removed uitest `npm run` task. The tests were split/updated for travis-ci with https://github.com/brave/browser-laptop/pull/7773 and this broke the `uitest` task. Since the unit tests run quickly and `npm run unittest` still works great, this task isn't really needed anymore.
Removed uitest `npm run` task. The tests were split/updated for travis-ci with https://github.com/brave/browser-laptop/pull/7773 and this broke the `uitest` task. Since the unit tests run quickly and `npm run unittest` still works great, this task isn't really needed anymore.

Auditors: 0c95be2e0a36318d7b596c5e88b7b08f643c1629@diracdeltas

diasdavid/browser-laptop,timborden/browser-laptop,luixxiul/browser-laptop,timborden/browser-laptop,timborden/browser-laptop,timborden/browser-laptop,luixxiul/browser-laptop,diasdavid/browser-laptop,diasdavid/browser-laptop,diasdavid/browser-laptop,luixxiul/browser-laptop,luixxiul/browser-laptop