Those are status messages. Right-click on it and select "Disable Status Messages". Or, if you're using an older version of the TD and you don't see that option, go to the Preferences tab and press the Status Messages button and then check the box at the bottom that says "Disable all status messages". There's also a checkbox on the Controls tab, in the Messages section, to do the same.
If you want to keep them but just move them, you can do that by pressing the Status Messages button on the Preferences tab.