Both versions (4:3 and 16:9) include the cityicons.pcx and the background.pcx
This is the original background with the line taken out and a copy of cityicons with the small pollution icon (more to the required corner).
You still have to in the labels.txt file replace the word pollution with a space (leave the space there).
This is the before pic:
City Screens to Display More Luxuries (4:3 and 16: 2016-10-05
City Screens to Display More Luxuries (4:3 and 16: