code: def tearDown(self):
      self.f.delete_hook(self.h.name)
  
imports: import unittest
  import numpy
  import six
  import chainer
  from chainer.backends import cuda
  from chainer import function_hooks
  from chainer import functions
  from chainer.functions.math import basic_math
  from chainer import testing
  from chainer.testing import attr
label_desc: Use image node_id 2 for calling the TestCupyMemoryProfileHookToFunction obj's underlying member method code with example usage: obj.tearDown() without return types