vendor: remove dep and use vndr

Signed-off-by: Antonio Murdaca <runcom@redhat.com>

vendor/github.com/opencontainers/runc/libcontainer/stacktrace/frame.go

@@ -1,38 +0,0 @@
-package stacktrace
-
-import (
-	"path/filepath"
-	"runtime"
-	"strings"
-)
-
-// NewFrame returns a new stack frame for the provided information
-func NewFrame(pc uintptr, file string, line int) Frame {
-	fn := runtime.FuncForPC(pc)
-	if fn == nil {
-		return Frame{}
-	}
-	pack, name := parseFunctionName(fn.Name())
-	return Frame{
-		Line:     line,
-		File:     filepath.Base(file),
-		Package:  pack,
-		Function: name,
-	}
-}
-
-func parseFunctionName(name string) (string, string) {
-	i := strings.LastIndex(name, ".")
-	if i == -1 {
-		return "", name
-	}
-	return name[:i], name[i+1:]
-}
-
-// Frame contains all the information for a stack frame within a go program
-type Frame struct {
-	File     string
-	Function string
-	Package  string
-	Line     int
-}