A simple way to get rid of it, I find, is to just execute any command at the prompt even a trivial one like a single number. For instance, when I run the first section of this code -
the command prompt stays at the bottom of the screen, but then goes away when I enter the number of zero -
As for whether it is a deliberate design choice, I doubt it. If it were, it wouldn't be so trivial to get rid of.