Don't disable QEMU emulation if it doesn't exist?

[This line](https://github.com/abiosoft/colima/blob/164ab2b56663a530fcf0bf4bd817a23089df6984/environment/vm/lima/lima.go#L635) throws a warning when `/proc/sys/fs/binfmt_misc/qemu-x86_64` doesn't exist in the guest VM. Granted it's only a warning but should the absence of this file altogether just be treated as a non-error? It's also possible there's something I'm not considering...