--- a/rust/hg-core/src/dirstate_tree/dirstate_map.rs	Fri Apr 09 13:13:19 2021 +0200
+++ b/rust/hg-core/src/dirstate_tree/dirstate_map.rs	Tue Apr 13 17:02:58 2021 +0200
@@ -19,7 +19,6 @@
 use crate::DirstateParents;
 use crate::DirstateStatus;
 use crate::EntryState;
-use crate::FastHashMap;
 use crate::HgPathCow;
 use crate::PatternFileWarning;
 use crate::StateMapIter;
@@ -565,10 +564,6 @@
         Ok(packed)
     }
 
-    fn build_file_fold_map(&mut self) -> &FastHashMap<HgPathBuf, HgPathBuf> {
-        todo!()
-    }
-
     fn set_all_dirs(&mut self) -> Result<(), DirstateMapError> {
         // Do nothing, this `DirstateMap` does not a separate `all_dirs` that
         // needs to be recomputed