we want inner values to be strings, even if it is json strings

pkg/provider/vault/vault.go

@@ -17,7 +17,6 @@ package vault
 import (
 	"context"
 	"crypto/x509"
-	"encoding/json"
 	"errors"
 	"fmt"
 	"io/ioutil"
@@ -206,13 +205,6 @@ func (v *client) readSecret(ctx context.Context, path, version string) (map[stri
 			byteMap[k] = []byte(t)
 		case []byte:
 			byteMap[k] = t
-		case map[string]interface{}:
-			jsonString, err := json.Marshal(t)
-			byteMap[k] = jsonString
-			if err != nil {
-				return nil, err
-			}
-
 		default:
 			return nil, fmt.Errorf(errSecretFormat, secretData)
 		}