code: def tearDown(self):
      _core.set_reduction_accelerators(self.accelerators)
  
imports: import unittest
  import numpy
  import pytest
  import cupy
  import cupy._core._accelerator
  from cupy import _core
  from cupy import testing
label_desc: Use image node_id 2 for calling the TestSimpleReductionFunctionComplexWarning obj's underlying member method code with example usage: obj.tearDown() without return types