Remove extra function wrap

[unional]

Fix #169

System.import() returns a promise.
.then() accepts a promise in return, not a function.

[aviary-wf]

Raven

Number of Findings: 0

[unional]

karma.start() was being called automatically when certain time has passed, not from this line:
https://github.com/Workiva/karma-jspm/blob/master/src/adapter.js#L65

If you added console.log('karma.start())` to it, you can see it is not being called.

This is because after the first call, the promiseChain resolved to a function with other System.import() calls, so they are "detached" and not tracked.

[3cp]

Why there is no follow up for this much needed fix?