Fix issue where logout fails on wakeup with no internet connectivity

Waltz has had an issue for some time where logout was failing on wakeup because the siteConfigs were not loaded when logout was called.

I *believe* that this issue is caused by the chunk of code that is removed by this PR. From what I can tell, it serves the exact same purpose as the code [here](https://github.com/waltzio/waltz/blob/develop/static/js/background/delegate.js#L147), except it doesn't wait for configs to be loaded — only for the navigator to be online.

@landakram can you review when you get a chance