The code has been disabled during the last rust upgrade, and has not found an
owner. Since the next rust upgrade will bitrot it even more, it is better to
remove it for now. If anyone wishes to restore it, the code remains in version
history.
This change makes glutin the default windowing system on mac/linux.
If you run into any issues with the glutin system, you can temporarily
build the GLFW system with the following command:
cd components/servo
../../mach cargo build --no-default-features --features=glfw
Once any glutin related issues have been sorted out, the GLFW
port will be removed.