If you didn’t upgrade your Dreamhouse Classic app to Dreamhouse Lightning, you need to do that now.
Click the Setup icon and choose Setup.
Click on Apps and choose App Manager.
Click the Actions dropdown for the Dreamhouse Classic app and click Upgrade. Name the new application Dreamhouse Lightning and click Save (this may take a minute to complete).
force:lightningQuickActionWithoutHeaderto the implements attribute. Don’t forget the comma to separate the values from one another.