diff --git a/src/interpret/types.rs b/src/interpret/types.rs
index 31dc0aa..1d912ba 100644
--- a/src/interpret/types.rs
+++ b/src/interpret/types.rs
@@ -3,7 +3,6 @@
 use crate::ast;
 use std::collections::BTreeMap;
 use std::collections::HashMap;
-use std::rc::Rc;
 
 #[derive(PartialEq, Debug, thiserror::Error)]
 pub enum Error {