How-to disable annoying flash plugin message?

I’ve comlpete removed flash player from my PC.
Every time on a website whit flash contend i get an annoying flash plugin install message

It nerves extremly! :-TD

How-to disable this annoying flash plugin message?

CD v 60.0.3112.114 (portable)
I’ve already done:
Settings->Advanced->‘Privacy and security’->Content settings->Flash->blocking
Dose not solve.