Removes the duble import of from sklearn.neighbors import NearestNeighbors in the resample methods.
Removes the duble import of from sklearn.neighbors import NearestNeighbors
in the resample methods.

dvro/imbalanced-learn,glemaitre/UnbalancedDataset,glemaitre/UnbalancedDataset,ningyuwhut/UnbalancedDataset,fmfn/UnbalancedDataset,yangspeaking/UnbalancedDataset,dvro/UnbalancedDataset,scikit-learn-contrib/imbalanced-learn,dvro/UnbalancedDataset,fmfn/UnbalancedDataset,implus/UnbalancedDataset,dvro/imbalanced-learn,scikit-learn-contrib/imbalanced-learn