Sidekick showing in Publish instance
When accessing a publish instance, the sidekick appears when pages are loaded.
OSGi configuration settings below show runmode is publish:
a) Sling Settings 
b) System Properties 
- Disable the Day CQ WCM Filter.
This should be done if the instance was installed as publish and it wasn't changed from an author instance.
- Search to item "Day CQ WCM Filter" 
- Change the value to 'disable' and save it.