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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def remove_independent_variable(self, variable_name):
 """ Remove an independent variable which was added with add_independent_variable :param variable_name: name of variable to remove :return: """


        self._remove_child(variable_name)

        # Remove also from the list of independent variables
        self._independent_variables.pop(variable_name)