mminor(dev): fix unique names from ISO

daiso.py

@@ -1236,7 +1236,7 @@ class DAISO(datasets.GeneratorBasedBuilder):
         if self.config.label_classes:
             features["Label"] = datasets.features.ClassLabel(names=list(self.config.label_classes.keys()))
             features["Label_ISO"] = datasets.features.ClassLabel(
-                names=[map.get("ISO") for map in self.config.label_classes.values()])
+                names=set([map.get("ISO") for map in self.config.label_classes.values()]))
         features["Idx"] = datasets.Value("int32")
         # if self.config.name == "":  # This is the name of the configuration selected in BUILDER_CONFIGS above
         #     features = datasets.Features(