| Theme Version: You are likely using sphinx-rtd-theme v3.0+, which removed display_version in favor of more modern version-handling tools.
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| The Warning: Sphinx flags any key it doesn't recognize inside html_theme_options. By deleting it, you stop the theme from trying to process an unknown variable.
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| Impact: Since the option was already "unsupported," removing the line won't change how your documentation looks; it just stops the build logs from being cluttered.
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