"warning strip" above the toolbar

I’m fresh user of DT Pro. Above the toolbar is something like warning strip tape. I’m not sure if it’s correct, because every picture with main window which I saw is pretty clean, without (abominable) strip. See the attached picture from my toolbar. Is it possible to change it? Thanks for advice.
Picture 3.png

I think that’s just a convention to indicate that it is a beta product. I’m sure it’ll be removed whenever the final release comes.


thanks for the answer. It sounds like a solution:-)