Remove SysinitPath from process

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

container.go

@@ -686,7 +686,6 @@ func (container *Container) Start() (err error) {
 		Network:    en,
 		Tty:        container.Config.Tty,
 		User:       container.Config.User,
-		SysInitPath: runtime.sysInitPath,
 	}
 	container.process.SysProcAttr = &syscall.SysProcAttr{Setsid: true}
 

execdriver/driver.go

@@ -40,7 +40,6 @@ type Process struct {
 	ConfigPath string
 	Tty        bool
 	Network    *Network // if network is nil then networking is disabled
-	SysInitPath string
 }
 
 func (c *Process) Pid() int {

execdriver/lxc/driver.go

@@ -256,6 +256,7 @@ func linkLxcStart(root string) error {
 	return os.Symlink(sourcePath, targetPath)
 }
 
+// TODO: This can be moved to the mountinfo reader in the mount pkg
 func rootIsShared() bool {
 	if data, err := ioutil.ReadFile("/proc/self/mountinfo"); err == nil {
 		for _, line := range strings.Split(string(data), "\n") {