diff --git a/src/Workspaces/Core/Portable/Workspace/Solution/TextDocumentStates.cs b/src/Workspaces/Core/Portable/Workspace/Solution/TextDocumentStates.cs
index 324fd4c211c5a..4dea1bb700f59 100644
--- a/src/Workspaces/Core/Portable/Workspace/Solution/TextDocumentStates.cs
+++ b/src/Workspaces/Core/Portable/Workspace/Solution/TextDocumentStates.cs
@@ -147,7 +147,6 @@ public async ValueTask<ImmutableArray<TValue>> SelectAsArrayAsync<TValue, TArg>(
     }
 
     public TextDocumentStates<TState> AddRange(ImmutableArray<TState> states)
-        // TODO: we could more efficiently generate the new filePathToDocumentIds here.
         => new(_ids.AddRange(states.Select(state => state.Id)),
                _map.AddRange(states.Select(state => KeyValuePairUtil.Create(state.Id, state))),
                filePathToDocumentIds: null);
@@ -170,8 +169,6 @@ public TextDocumentStates<TState> RemoveRange(ImmutableArray<DocumentId> ids)
         }
 
         IEnumerable<DocumentId> enumerableIds = ids;
-
-        // TODO: we could more efficiently generate the new filePathToDocumentIds here.
         return new(_ids.RemoveRange(enumerableIds), _map.RemoveRange(enumerableIds), filePathToDocumentIds: null);
     }