Remove unneeded deps

[NullVoxPopuli]

Deps that are still required

• ember-auto-import (because ember-auto-import has a check to make sure the host project has ember-auto-import)
• ember-cli-babel -- something has to configure babel

[mansona]

I want to get CI running a build and a test before we make changes like this

CI is now running!

[mansona]

ember-cli-babel -- something has to configure babel

for now! I suspect when we're finished we won't need this 👍

[mansona]

nice one!