The black bar is now handled in layout files instead of data (who knows why, Blizzard touching things they didn't need to).
Go to the UI module and just look at "Game UI". There should be a field called WorldConsoleBottom = "200", or something along those lines. Use layout files to change it to 0.
Trigger, layout, interface specialist for Aeon of Storms.

Demtrod Regular ShmoeI made a custom UI using the Layout files. There used to be an option ( according to this tutorial: http://www.sc2mapster.com/forums/resources/tutorials/20323-ui-sc2layout-files-override-method-aiurchef-method/#w-1-how-do-i-remove-the-black-bar-at-the-bottom-of-my ) to move the "black bar" at the bottom. )
This was done through Data Editor - Game UI data. There was a field called World Console Bottom, which had to be changed to 0.
Now after the new patch the black bar seems to be back and I can't really find any way to remove it.
Gridlock TD : Elements