In file rfe.py, the RFE class inherits MetaEstimatorMixin

class RFE(BaseEstimator, MetaEstimatorMixin, SelectorMixin):

Then RFECV inherits RFE and also inherits MetaEstimatorMixin again.

class RFECV(RFE, MetaEstimatorMixin):

I tried to remove MetaEstimatorMixin from RFECV parents and everything seems to work fine. May it be a good idea to remove the duplicated inheritance?