Upload speeddating.py

speeddating.py

@@ -214,7 +214,6 @@ class Speeddating(datasets.GeneratorBasedBuilder):
         data.drop("has_null", axis="columns", inplace=True)
         data.drop("field", axis="columns", inplace=True)
         data.drop("wave", axis="columns", inplace=True)
-        data.drop("wave", axis="columns", inplace=True)
         data.drop("d_age", axis="columns", inplace=True)
         data.drop("d_d_age", axis="columns", inplace=True)
         data.drop("d_importance_same_race", axis="columns", inplace=True)