Which two actions are necessary to delete a manually installed theme?
A manually installed, non-Composer theme must have its code removed from app/design/frontend/<VendorName>/<ThemeName> and its corresponding registration removed from the theme database table. The theme:uninstall command is for Composer-packaged themes, while disabling a theme does not remove its code or database record.
app/design/frontend/<VendorName>/<ThemeName>
theme
theme:uninstall
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