Google Hotel Center has reinstated all previously suspended hotels and is removing the “Suspended Hotels” tab.
The old suspension tool, mainly used for quick shutdowns during price accuracy issues, is being deprecated as Google now relies on better automated systems.
Google expects no downsides for partners, and some may even see a slight traffic boost as all properties are eligible to appear again.

Read the official announcement here: Reinstating suspended properties, and removing the Suspension Tab.
This update was spotted by Barry Schwartz.