diff --git a/src/bytecode.rs b/src/bytecode.rs
index 7356972..80d37b0 100644
--- a/src/bytecode.rs
+++ b/src/bytecode.rs
@@ -1,5 +1,3 @@
-use std::hash::Hash;
-
 use ecow::EcoString;
 
 use crate::ty::internal::{Const, Param};
@@ -94,7 +92,7 @@ pub enum OpCode {
     NoOp,
 }
 
-#[derive(Debug, Clone, Copy, Hash)]
+#[derive(Debug, Clone, Copy)]
 pub enum BinOp {
     Add,
     And,
@@ -104,7 +102,7 @@ pub enum BinOp {
     Upd,
 }
 
-#[derive(Debug, Clone, Copy, Hash)]
+#[derive(Debug, Clone, Copy)]
 pub enum UnOp {
     Not,
 }
diff --git a/src/ty/internal/cnst.rs b/src/ty/internal/cnst.rs
index af022ed..22f79d3 100644
--- a/src/ty/internal/cnst.rs
+++ b/src/ty/internal/cnst.rs
@@ -107,16 +107,3 @@ impl PartialEq for Const {
 }
 
 impl Eq for Const {}
-
-/* impl Hash for Const {
-    fn hash<H: Hasher>(&self, state: &mut H) {
-        use Const::*;
-        match self {
-            Bool(b) => b.hash(state),
-            Int(int) => int.hash(state),
-            Float(float) => float.to_bits().hash(state),
-            String(string) => string.hash(state),
-            Func(func) => func.hash(state),
-        }
-    }
-} */
diff --git a/src/ty/internal/mod.rs b/src/ty/internal/mod.rs
index a8fd615..b27c181 100644
--- a/src/ty/internal/mod.rs
+++ b/src/ty/internal/mod.rs
@@ -27,7 +27,7 @@ pub trait ToPublic {
     fn to_public(self, vm: &VM) -> p::Value;
 }
 
-#[derive(Debug, PartialEq, Eq, Hash, Clone, Copy, Constructor)]
+#[derive(Debug, PartialEq, Eq, Clone, Copy, Constructor)]
 pub struct Thunk(usize);
 
 #[derive(Debug, IsVariant, Unwrap, Clone, PartialEq)]
diff --git a/src/ty/public/cnst.rs b/src/ty/public/cnst.rs
index 4527555..3d4788e 100644
--- a/src/ty/public/cnst.rs
+++ b/src/ty/public/cnst.rs
@@ -1,5 +1,3 @@
-use std::hash::{Hash, Hasher};
-
 use anyhow::Error;
 use derive_more::{IsVariant, Unwrap};
 use ecow::EcoString;
@@ -121,16 +119,3 @@ impl PartialEq for Const {
 }
 
 impl Eq for Const {}
-
-impl Hash for Const {
-    fn hash<H: Hasher>(&self, state: &mut H) {
-        use Const::*;
-        match self {
-            Bool(b) => b.hash(state),
-            Int(int) => int.hash(state),
-            Float(float) => float.to_bits().hash(state),
-            String(string) => string.hash(state),
-            func @ Func => func.hash(state),
-        }
-    }
-}