1 files changed, 0 insertions, 6 deletions
diff --git a/libraries/base/Data/Functor/Sum.hs b/libraries/base/Data/Functor/Sum.hs
index cca541fe5e..f7d6178a2b 100644
--- a/libraries/base/Data/Functor/Sum.hs
+++ b/libraries/base/Data/Functor/Sum.hs
@@ -1,9 +1,7 @@
 {-# LANGUAGE DeriveDataTypeable #-}
 {-# LANGUAGE DeriveGeneric #-}
 {-# LANGUAGE PolyKinds #-}
-{-# LANGUAGE RankNTypes #-}
 {-# LANGUAGE Safe #-}
-{-# LANGUAGE StandaloneKindSignatures #-}
 -----------------------------------------------------------------------------
 -- |
 -- Module      :  Data.Functor.Sum
@@ -25,15 +23,11 @@ module Data.Functor.Sum (
 
 import Control.Applicative ((<|>))
 import Data.Data (Data)
-import Data.Kind (Type)
 import Data.Functor.Classes
 import GHC.Generics (Generic, Generic1)
 import Text.Read (Read(..), readListDefault, readListPrecDefault)
 
 -- | Lifted sum of functors.
---
--- Kind `k` explicitly quantified since 4.15.0.0.
-type Sum :: forall k. (k -> Type) -> (k -> Type) -> (k -> Type)
 data Sum f g a = InL (f a) | InR (g a)
   deriving ( Data     -- ^ @since 4.9.0.0
            , Generic  -- ^ @since 4.9.0.0