readme update

pkg/common/utils/command.go

@@ -1,7 +1,6 @@
 package utils
 
 import (
-	"bytes"
 	"fmt"
 	"os"
 	"os/exec"
@@ -11,13 +10,8 @@ func ExecCmd(name string, args, env []string) error {
 	cmd := exec.Command(name, args...)
 	cmd.Env = append(os.Environ(), env...)
 
-	var stdout, stderr bytes.Buffer
-	cmd.Stdout = &stdout
-	cmd.Stderr = &stderr
-
 	if err := cmd.Run(); err != nil {
-		return fmt.Errorf("error running cmd %s: %s\nStderr: %s", name,
-			err.Error(), stderr.String())
+		return fmt.Errorf("error running cmd %s: %s\n", name, err.Error())
 	}
 	return nil
 }