Simplify a single AIL block.

        :param ailment.Block ail_block: The AIL block to simplify.
        :param stack_pointer_tracker:   The RegisterDeltaTracker analysis instance.
        :return:                        A simplified AIL block.

def _simplify_block(self, ail_block, stack_pointer_tracker=None):
        """
        Simplify a single AIL block.

        :param ailment.Block ail_block: The AIL block to simplify.
        :param stack_pointer_tracker:   The RegisterDeltaTracker analysis instance.
        :return:                        A simplified AIL block.
        """

        simp = self.project.analyses.AILBlockSimplifier(ail_block, stack_pointer_tracker=stack_pointer_tracker)
        return simp.result_block