Drupal8: Deprecate the Views integration?

From: https://github.com/civicrm/civicrm-drupal-8/pull/3#issuecomment-412927333

"Just wanted to let you'll know that the latest CiviCRM Entity 8.x-3.x-dev version includes Views support....Not telling you what to do, but the "Core Views Integration" could be handled by that module...." (@jackrabbithanna)

Since CiviCRM-D8 is not officially supported yet, now might be a good time to cut-off core views support? (although pingbacks report over 100 sites).

It's still a fair amount of work, however, to PSA and confirm that CiviCRM Entity feature-equivalent?

+/-1? cc @jackrabbithanna @dsnopek @eileen .. who else?