Not really. You could use the inbuilt syntax-checker within script-editor or using the above mentioned document analyzer to identify not used tables/fields but you need to check yourself if your script and datamodel works logically in regard to your data, data-quality and requirements and delivered therefore the correct results within the UI.
Document Analyzer does provide some measures of "Code quality" (depends on how you define code quality in QV). For example, what percentage of expressions use variables, # of tables used in an expression. It's also easy to create your measures -- for example, expression character length -- from the supplied metadata.
