[doc][R] Update arguments for ellipsis in predict (#9868)

R-package/R/xgb.Booster.R

@@ -194,7 +194,7 @@ xgb.Booster.complete <- function(object, saveraw = TRUE) {
 #' @param strict_shape  Default is \code{FALSE}. When it's set to \code{TRUE}, output
 #'        type and shape of prediction are invariant to model type.
 #'
-#' @param ... Parameters passed to \code{predict.xgb.Booster}
+#' @param ... Not used.
 #'
 #' @details
 #'