fix(occlusion): temporarily remove yield inside vertical-collection
fix(occlusion): temporarily remove yield inside vertical-collection

This defuses https://github.com/html-next/vertical-collection/issues/161 for now.

More information about this: https://github.com/offirgolan/ember-light-table/pull/514#issuecomment-346613745

offirgolan/ember-light-table,offirgolan/ember-light-table