* Consume Nimbus FML plugin
* Convert Homescreen to use FML
* Convert nimbusValidation to use FML
* Convert legacy experiments to use the feature API and FML
Remove dead helper code and documentation
* Fixup failing test
Co-authored-by: Grisha Kruglov <gkruglov@mozilla.com>
Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>