Update _axes.py to enable SampleConcatter for metadata_routing

Author: filippozacchei

pysindy/utils/_axes.py

@@ -70,7 +70,6 @@
 import numpy as np
 from numpy.typing import NDArray
 from sklearn.base import BaseEstimator, TransformerMixin
-from sklearn.utils.metadata_routing import MetadataRequester
 from sklearn.utils._metadata_requests import MetadataRequester