Remove invalid testA and testB from refcocog.

referit.py

@@ -155,7 +155,10 @@ class ReferitDataset(datasets.GeneratorBasedBuilder):
         # urls = _URLS[self.config.name]
         # data_dir = dl_manager.download_and_extract(urls)
         splits = []
-        for split in ("train", "val", "test", "testA", "testB"):
+        split_names = ("train", "val", "test")
+        if self.config.name in ("refcoco", "refcoco+"):
+            split_names += ("testA", "testB")
+        for split in split_names:
             splits.append(datasets.SplitGenerator(
                 name=datasets.NamedSplit(split),
                 gen_kwargs={