Hi valerian and WELCOME to forums !!!
Open SETTINGS, and go to UPDATE (BASIC) otpions. From there you have to click on DETAILS and then... well, take a look at screenshot... set running mode to SILENT and you won't see those messages any more.
P.S. It's been explained many many times in these forums already. If you haven't noticed (for future reference) there is very causy SEARCH option in these forums. Just click on that and enter your key word. I'm not telling this because I don't wanna help you, but because it will give you an answer much much faster.
Cheers !