pkg/store/disk.go: `inspectDiskSize` does not need to fallback to qemu-img

[AkihiroSuda]

lima/pkg/store/disk.go

Lines 64 to 82 in 1f787fb

	// inspectDisk attempts to inspect the disk size and format by itself,
	// and falls back to inspectDiskWithQemuImg on an error.
	func inspectDisk(fName string) (size int64, format string, _ error) {
	f, err := os.Open(fName)
	if err != nil {
	return inspectDiskWithQemuImg(fName)
	}
	defer f.Close()
	img, err := qcow2reader.Open(f)
	if err != nil {
	return inspectDiskWithQemuImg(fName)
	}
	sz := img.Size()
	if sz < 0 {
	return inspectDiskWithQemuImg(fName)
	}
	return sz, string(img.Type()), nil
	}

go-qcow2reader should suffice to inspect the disk size.

I don't remember why I added inspectDiskSizeWithQemuImg fall-back in 20c2224 . Probably go-qcow2reader was immature at that time