fix test

milli/src/update/settings.rs

@@ -400,7 +400,6 @@ impl<'a, 't, 'i> Settings<'a, 't, 'i> {
     {
         puffin::profile_function!();
 
-        let fields_ids_map = self.index.fields_ids_map(self.wtxn)?;
         // if the settings are set before any document update, we don't need to do anything, and
         // will set the primary key during the first document addition.
         if self.index.number_of_documents(self.wtxn)? == 0 {