I don't recall there being a way to hide the red/green points that fly off bots without also hiding the immobilization counter.
However, you can remove the status meters (names, points, power, CO2, health, critical hits, and background) without removing anything else by modifying your UI/common/statusmeters.gib. The easiest way of accomplishing this would be to open the file up in Notepad and change line 17 from this:
Visible true
to this:
Visible false