[CT-1175] [Duplicate] mypy broken despite no code changes

[colin-rogers-dbt]

Describe the bug

See: dbt-labs/dbt-redshift#185

Steps To Reproduce

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Expected behavior

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Screenshots and log output

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System information

The output of dbt --version:

<output goes here>

The operating system you're using:

The output of python --version:

Additional context

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