merge #4268 into opencontainers/runc:main

Kir Kolyshkin (2):
  libct: fix a comment
  libct/system: rm Execv

LGTMs: AkihiroSuda cyphar

libcontainer/standard_init_linux.go

@@ -167,7 +167,7 @@ func (l *linuxStandardInit) Init() error {
 		}
 	}
 
-	// Tell our parent that we're ready to Execv. This must be done before the
+	// Tell our parent that we're ready to exec. This must be done before the
 	// Seccomp rules have been applied, because we need to be able to read and
 	// write to a socket.
 	if err := syncParentReady(l.pipe); err != nil {

libcontainer/system/linux.go

@@ -7,7 +7,6 @@ import (
 	"fmt"
 	"io"
 	"os"
-	"os/exec"
 	"strconv"
 	"syscall"
 	"unsafe"
@@ -36,14 +35,6 @@ func (p ParentDeathSignal) Set() error {
 	return SetParentDeathSignal(uintptr(p))
 }
 
-func Execv(cmd string, args []string, env []string) error {
-	name, err := exec.LookPath(cmd)
-	if err != nil {
-		return err
-	}
-	return Exec(name, args, env)
-}
-
 func Exec(cmd string, args []string, env []string) error {
 	for {
 		err := unix.Exec(cmd, args, env)