Mif2Go keeps track of which paragraph and character formats are actually used in the output file, and can remove unused formats. The default is to leave them in:
; RemoveUnusedStyles = No (default for Word) or Yes
If your document contains variables that refer to unused paragraph formats, the following setting prevents Word from displaying an error message:
; WriteAllVarForms = No (default) or Yes (write empty hidden paras
; for all var formats even if they appear to be used in doc body)