warnings: remove/tweak some dead code

It looks like the dead code detector got better, so do a little code
cleanup.

crates/ignore/src/types.rs

@@ -122,10 +122,6 @@ enum GlobInner<'a> {
     Matched {
         /// The file type definition which provided the glob.
         def: &'a FileTypeDef,
-        /// The index of the glob that matched inside the file type definition.
-        which: usize,
-        /// Whether the selection was negated or not.
-        negated: bool,
     },
 }
 
@@ -291,13 +287,9 @@ impl Types {
         self.set.matches_into(name, &mut *matches);
         // The highest precedent match is the last one.
         if let Some(&i) = matches.last() {
-            let (isel, iglob) = self.glob_to_selection[i];
+            let (isel, _) = self.glob_to_selection[i];
             let sel = &self.selections[isel];
-            let glob = Glob(GlobInner::Matched {
-                def: sel.inner(),
-                which: iglob,
-                negated: sel.is_negated(),
-            });
+            let glob = Glob(GlobInner::Matched { def: sel.inner() });
             return if sel.is_negated() {
                 Match::Ignore(glob)
             } else {