utils: remove unused Prctl wrapper

Remove the Prctl wrapper function which has been unused since commit
d2f6a4c0e2. If a prctl wrapper would be needed in the future,
golang.org/x/sys provides unix.Prctl which could be used instead.

Signed-off-by: Tobias Klauser <tklauser@distanz.ch>

utils/utils.go

@@ -6,7 +6,6 @@ import (
 	"io"
 	"os/exec"
 	"strings"
-	"syscall"
 
 	systemdDbus "github.com/coreos/go-systemd/dbus"
 	"github.com/godbus/dbus"
@@ -44,15 +43,6 @@ func ExecCmdWithStdStreams(stdin io.Reader, stdout, stderr io.Writer, name strin
 	return nil
 }
 
-// Prctl is a way to make the prctl linux syscall
-func Prctl(option int, arg2, arg3, arg4, arg5 uintptr) (err error) {
-	_, _, e1 := syscall.Syscall6(syscall.SYS_PRCTL, uintptr(option), arg2, arg3, arg4, arg5, 0)
-	if e1 != 0 {
-		err = e1
-	}
-	return
-}
-
 // StatusToExitCode converts wait status code to an exit code
 func StatusToExitCode(status int) int {
 	return ((status) & 0xff00) >> 8