preserve incoming query params in success_action_redirect (#15280)

fixes #15274

cmd/handler-utils.go

@@ -27,7 +27,6 @@ import (
 	"mime/multipart"
 	"net/http"
 	"net/textproto"
-	"net/url"
 	"regexp"
 	"strings"
 
@@ -197,16 +196,6 @@ func extractMetadataFromMime(ctx context.Context, v textproto.MIMEHeader, m map[
 	return nil
 }
 
-// The Query string for the redirect URL the client is
-// redirected on successful upload.
-func getRedirectPostRawQuery(objInfo ObjectInfo) string {
-	redirectValues := make(url.Values)
-	redirectValues.Set("bucket", objInfo.Bucket)
-	redirectValues.Set("key", objInfo.Name)
-	redirectValues.Set("etag", "\""+objInfo.ETag+"\"")
-	return redirectValues.Encode()
-}
-
 // Returns access credentials in the request Authorization header.
 func getReqAccessCred(r *http.Request, region string) (cred auth.Credentials) {
 	cred, _, _ = getReqAccessKeyV4(r, region, serviceS3)