code: def test__remove_original_values(self):
      config_vars = {
          "CC": "gcc-test -pthreads",
      }
      expected_vars = {
          "CC": "clang -pthreads",
      }
      cv = "CC"
      newvalue = "clang -pthreads"
      _osx_support._save_modified_value(config_vars, cv, newvalue)
      self.assertNotEqual(expected_vars, config_vars)
      _osx_support._remove_original_values(config_vars)
      self.assertEqual(expected_vars, config_vars)
  
imports: import os
  import platform
  import stat
  import sys
  import unittest
  from test.support import os_helper
  import _osx_support
label_desc: Use image node_id 7 for calling the Test_OSXSupport obj's underlying member method code with example usage: obj.test__remove_original_values() without return types