Shared: Remove unused type

shared/tree-sitter-extractor/src/extractor/mod.rs

@@ -4,7 +4,6 @@ use crate::node_types::{self, EntryKind, Field, NodeTypeMap, Storage, TypeName};
 use crate::trap;
 use std::collections::BTreeMap as Map;
 use std::collections::BTreeSet as Set;
-use std::fmt;
 use std::path::Path;
 
 use tree_sitter::{Language, Node, Parser, Range, Tree};
@@ -636,13 +635,3 @@ fn traverse(tree: &Tree, visitor: &mut Visitor) {
         }
     }
 }
-
-// Numeric indices.
-#[derive(Debug, Copy, Clone)]
-struct Index(usize);
-
-impl fmt::Display for Index {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        write!(f, "{}", self.0)
-    }
-}