Remove unused global descriptor

[xu-song]

Description

Remove unused global descriptor

Type of change

Please delete options that are not relevant.

• [ ] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
• [x] Refactor (does not change functionality, e.g. code style improvements, linting)
• [ ] Documentation update

[CLAassistant]

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