How do I turn off the "Running in software rendering mode" warning?

I'm running Arch Linux/Cinnamon in Virtual Box on a Windows 7 machine. One of the technologies I need to use is WebGL. For whatever reason (that's a different issue), WebGL will not work when Display->Screen->Enable 3D Acceleration is enabled in Virtual Box. As a result, I've turned off 3D Acceleration, and am able to use WebGL just fine. When I boot, though, I get a warning telling me I am running in software rendering mode. Is there some way to disable this warning?