Some questions about removing things from the dashboard

Hi Guys

I was thinking if there was any html codes or snippets to remove these items from the dashboard, so my user dont see them.

1. Like you can see on the attached image, there is a yellow news box, that are showing links to the plugins homepage. Is there some way to remove these messages?

2. Like you also can see on the attached image, the shortcode buttons are visible when the user are in the dashboard. Is there some way to remove them. I have used the buttons now, so I dont mind if I cant see them anymore.

3. This is not on the attached image, but is there some way to remove the dashboard widgets. I would really like to remove the rtmedia dashboard widget because it is visible for my users in the dashboard.

I hope you guys can help :slight_smile: