Allow caps to be toggled in native driver with plugin flag

Docker-DCO-1.1-Signed-off-by: Michael Crosby <michael@crosbymichael.com> (github: crosbymichael)

runtime/execdriver/native/driver.go

@@ -75,9 +75,6 @@ func NewDriver(root, initPath string) (*driver, error) {
 }
 
 func (d *driver) Run(c *execdriver.Command, pipes *execdriver.Pipes, startCallback execdriver.StartCallback) (int, error) {
-	if err := d.validateCommand(c); err != nil {
-		return -1, err
-	}
 	var (
 		term        nsinit.Terminal
 		container   = createContainer(c)
@@ -181,15 +178,6 @@ func (d *driver) removeContainerRoot(id string) error {
 	return os.RemoveAll(filepath.Join(d.root, id))
 }
 
-func (d *driver) validateCommand(c *execdriver.Command) error {
-	// we need to check the Config of the command to make sure that we
-	// do not have any of the lxc-conf variables
-	for _, conf := range c.Config["native"] {
-		log.Println(conf)
-	}
-	return nil
-}
-
 func getEnv(key string, env []string) string {
 	for _, pair := range env {
 		parts := strings.Split(pair, "=")