removing unused methods

Signed-off-by: Juan Bustamante <[email protected]>

pkg/buildpack/buildpack.go

@@ -8,7 +8,6 @@ import (
 	"path"
 	"path/filepath"
 	"strings"
-	"syscall"
 
 	"github.com/BurntSushi/toml"
 	"github.com/buildpacks/lifecycle/api"
@@ -611,15 +610,3 @@ func (m *moduleTarCollection) close() []error {
 	}
 	return errors
 }
-
-func hasHardlinks(fi os.FileInfo) bool {
-	return fi.Sys().(*syscall.Stat_t).Nlink > 1
-}
-
-func getInodeFromStat(stat interface{}) (inode uint64, err error) {
-	s, ok := stat.(*syscall.Stat_t)
-	if ok {
-		inode = s.Ino
-	}
-	return
-}