vfkit: Remove unused NewHost parameter

Since the vfkit machine driver is not an external driver, we don't need
to pass BinDir() to NewHost(). This is similar to what is done for the
hyperv driver in pkg/crc/machine/driver_windows.go

Author: cfergeau

pkg/crc/machine/driver_darwin.go

@@ -4,7 +4,6 @@ import (
 	"encoding/json"
 	"errors"
 
-	"github.com/crc-org/crc/pkg/crc/constants"
 	"github.com/crc-org/crc/pkg/crc/logging"
 	"github.com/crc-org/crc/pkg/crc/machine/config"
 	"github.com/crc-org/crc/pkg/crc/machine/vfkit"
@@ -19,7 +18,7 @@ func newHost(api libmachine.API, machineConfig config.MachineConfig) (*host.Host
 	if err != nil {
 		return nil, errors.New("Failed to marshal driver options")
 	}
-	return api.NewHost("vf", constants.BinDir(), json)
+	return api.NewHost("vf", "", json)
 }
 
 func loadDriverConfig(host *host.Host) (*machineVf.Driver, error) {