Since I upgraded from Magento 2.2.7 to Magento 2.3.1 I am getting this message in the system.log file:
main.INFO: Consumer "async.operations.all" skipped as required connection "amqp" is not configured. Unknown connection name amqp  
I get this error also on a fresh Magento 2.3.1 install.
Where could I configure or disable it?