what should I do to avoid seeing those output message following?

In the following picture, the words below the black line is my program output. But I don't want to see those above the line, they seem to appear every time I run a program. How to turn off it,thanks.

1 comment
Official comment

Unfortunately, it's impossible to hide these lines at the moment. Please vote for IDEA-219274 to get notified when it's implemented.

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