1 files changed, 0 insertions, 4 deletions
diff --git a/src/Data/Expr/SharingRecovery.hs b/src/Data/Expr/SharingRecovery.hs
index d7d2313..11a4709 100644
--- a/src/Data/Expr/SharingRecovery.hs
+++ b/src/Data/Expr/SharingRecovery.hs
@@ -1,18 +1,14 @@
 {-# LANGUAGE BangPatterns #-}
 {-# LANGUAGE DataKinds #-}
 {-# LANGUAGE DefaultSignatures #-}
-{-# LANGUAGE DeriveFunctor #-}
 {-# LANGUAGE DerivingVia #-}
-{-# LANGUAGE FlexibleInstances #-}
 {-# LANGUAGE GADTs #-}
 {-# LANGUAGE LambdaCase #-}
-{-# LANGUAGE OverloadedStrings #-}
 {-# LANGUAGE QuantifiedConstraints #-}
 {-# LANGUAGE RankNTypes #-}
 {-# LANGUAGE ScopedTypeVariables #-}
 {-# LANGUAGE StandaloneDeriving #-}
 {-# LANGUAGE TypeOperators #-}
-{-# LANGUAGE UndecidableInstances #-}
 module Data.Expr.SharingRecovery where
 
 import Control.Applicative ((<|>))