Hi Gerard,
These INFO messages are from the HTTP requests (REQ) log source I believe. If you go to the App/Deploy/Environment tab and view the live log you will be able to see the "Displayed Log Sources" on the top right side. Just check if the HTTP Requests source is checked if yes then uncheck it.
PS: The above solution is with reference to MX sandbox cloud. I hope it would apply in the stated case as well. If not remember "HTTP Request Source" search and hunt for it. :)
In mendix V4 cloud live log does not work.
In environment log-levels i see some nodes with 'http' and 'request' but not with 'source'
I guess i'll just change some of those nodes to find out wether logging stops.