use std lib errors pkg in archive.go

Signed-off-by: James Sheppard <jgsheppa@protonmail.com>

pkg/chart/loader/archive.go

@@ -20,6 +20,7 @@ import (
 	"archive/tar"
 	"bytes"
 	"compress/gzip"
+	"errors"
 	"fmt"
 	"io"
 	"net/http"
@@ -28,8 +29,6 @@ import (
 	"regexp"
 	"strings"
 
-	"github.com/pkg/errors"
-
 	"helm.sh/helm/v3/pkg/chart"
 )
 
@@ -151,7 +150,7 @@ func LoadArchiveFiles(in io.Reader) ([]*BufferedFile, error) {
 		n = path.Clean(n)
 		if n == "." {
 			// In this case, the original path was relative when it should have been absolute.
-			return nil, errors.Errorf("chart illegally contains content outside the base directory: %q", hd.Name)
+			return nil, fmt.Errorf("chart illegally contains content outside the base directory: %q", hd.Name)
 		}
 		if strings.HasPrefix(n, "..") {
 			return nil, errors.New("chart illegally references parent directory")