I'm trying to repurpose some artwork and am running into an issue. In the image below, I simply want to delete the bottom right corner of the blue box so that the orange background is visible along the right edge of the curved shape and the blue box is visible along the left edge of the curved shape. But I cannot figure out how to do this. I've tried all the Pathfinder choices and none work. How can I do this? CS6, Windows 7. Thanks.
Mark