default CompletableFuture<Void> deleteAll(List<Delete> deletes) {
    return allOf(delete(deletes)).thenApply(r -> null);
  }
A simple version of batch delete. It will fail if there are any failures.
@param deletes list of things to delete.
@return A {@link CompletableFuture} that always returns null when complete normally.
hbase-client/src/main/java/org/apache/hadoop/hbase/client/AsyncTable.java