Just saw Paul's note about USB DMA from Flash being sketchy. In the boot loader it doesn't matter since we exec from RAM anyway, but we might as well un-const the WCID descriptor for consistency.

This is some Microsoft-specific gunk which allows us to work with usermode apps without any onerous driver installation. Much better user experience!

Originally I wasn't planning on doing this, but since I need to reclaim some RAM anyway, might as well just start hacking out everything we don't need...