[MRG] CLN: remove duplicate validation of X in Encoders transform #13347
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The
self._transform
method already callsself._check_X
which does this same validation (check_array) of X, so it should not be needed here (and confirmed by by the passing tests).This also prevented actually handling the DataFrame column by column on transform (#13253), but this is difficult to test now since both numpy and python encoding methods result in the same.