I'm using Magento 2 CE Version 2.1.1.
As per requirement i don't need "Product Review" Module. So i disable from Admin & Clear Cache
When i Edit any of the Admin Product then it says
"Attention: Something went wrong"
If i enable Product Review Module again then it works fine.
On product detail page we have "Product Reviews" tab, may be they are not checking.
If Review Module is Disabled then we don't need to show this tab.