Hyperparameters bruteforce rework

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Variables parameters
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src/training/decision_tree/model.py

@@ -67,6 +67,12 @@ class Model:
         
         return [train_mae, train_mse, test_mae, test_mse]
 
+    def release_training_data(self):
+        self._x_train = None
+        self._x_test = None
+        self._y_train = None
+        self._y_test = None
+
 
     def save_model(self, path):
         joblib.dump({