Remove redundant code.

Author: Hongtao Zhang

tests/helper/decorator.py

@@ -13,7 +13,6 @@
 rocm_test = unittest.skipIf(os.environ.get('SB_TEST_ROCM', '0') == '0', 'Skip ROCm tests.')
 
 pytorch_test = unittest.skipIf(os.environ.get('SB_TEST_PYTORCH', '1') == '0', 'Skip PyTorch tests.')
-python_eol_test = unittest.skipIf(sys.version_info < (3, 8), 'Skip tests for Python 3.7 or lower.')
 directx_test = unittest.skipIf(os.environ.get('SB_TEST_DIRECTX', '0') == '0', 'Skip DirectX tests.')