Remove unused SharedObjectLoadingScope in tenorflow_keras

Author: Shelnutt2

tiledb/ml/models/tensorflow_keras.py

@@ -15,7 +15,6 @@
 
 from ._base import Meta, TileDBArtifact, Timestamp
 
-SharedObjectLoadingScope = keras.utils.generic_utils.SharedObjectLoadingScope
 FunctionalOrSequential = (keras.models.Functional, keras.models.Sequential)
 TFOptimizer = keras.optimizers.TFOptimizer
 get_json_type = keras.saving.saved_model.json_utils.get_json_type