Delete specific xrefs from all files in a book

You can also use the BookXRefs file to delete xrefs. If you set the DeleteXRefCode parameter to a value (whatever you want, this example uses the string "~DELETE~" as the value), then assign that value as the "definition" to the xrefs you want to delete, the next time you run the Import XRef Definitions command, those xrefs will be deleted. For example, the following sample file will delete the HeaderOnly and HeaderQuoted xrefs from all files in the book.
[General] 
AltBookXRefsFile= 
DeleteXRefCode=~DELETE~ 
RenameXRefChar= 
ReplaceXRefChar= 
EditorType=0 
 
[Groups] 
Count=1 
1=MainGroup 
 
[MainGroup] 
HeaderOnly=~DELETE~ 
HeaderQuoted=~DELETE~ 
HeaderAndPage="<$paratext>" on page <$pagenum>
Attention: Be sure to use a unique string for the DeleteXRefCode to avoid inadvertently deleting xrefs!