Drop DeriveDataTypeable extension

hadrian.cabal

@@ -112,8 +112,7 @@ executable hadrian
 
     default-language:    Haskell2010
     default-extensions:  RecordWildCards
-    other-extensions:    DeriveDataTypeable
-                       , DeriveGeneric
+    other-extensions:    DeriveGeneric
                        , FlexibleInstances
                        , GeneralizedNewtypeDeriving
                        , LambdaCase

src/Oracles/ArgsHash.hs

-{-# LANGUAGE DeriveDataTypeable, GeneralizedNewtypeDeriving #-}
+{-# LANGUAGE GeneralizedNewtypeDeriving #-}
 module Oracles.ArgsHash (checkArgsHash, argsHashOracle) where
 
 import Base

src/Oracles/Config.hs

-{-# LANGUAGE DeriveDataTypeable, GeneralizedNewtypeDeriving #-}
+{-# LANGUAGE GeneralizedNewtypeDeriving #-}
 module Oracles.Config (askConfig, askConfigWithDefault, configOracle) where
 
 import Base

src/Oracles/Dependencies.hs

-{-# LANGUAGE DeriveDataTypeable, GeneralizedNewtypeDeriving #-}
+{-# LANGUAGE GeneralizedNewtypeDeriving #-}
 module Oracles.Dependencies (dependencies, dependenciesOracle) where
 
 import Control.Monad.Trans.Maybe

src/Oracles/LookupInPath.hs

-{-# LANGUAGE DeriveDataTypeable, GeneralizedNewtypeDeriving #-}
+{-# LANGUAGE GeneralizedNewtypeDeriving #-}
 module Oracles.LookupInPath (lookupInPath, lookupInPathOracle) where
 
 import System.Directory

src/Oracles/ModuleFiles.hs

-{-# LANGUAGE DeriveDataTypeable, GeneralizedNewtypeDeriving #-}
+{-# LANGUAGE GeneralizedNewtypeDeriving #-}
 module Oracles.ModuleFiles (
     decodeModule, encodeModule, findGenerator, haskellSources, moduleFilesOracle
     ) where

src/Oracles/PackageData.hs

-{-# LANGUAGE DeriveDataTypeable, GeneralizedNewtypeDeriving #-}
+{-# LANGUAGE GeneralizedNewtypeDeriving #-}
 module Oracles.PackageData (
     PackageData (..), PackageDataList (..),
     pkgData, pkgDataList, packageDataOracle

src/Oracles/PackageDeps.hs

-{-# LANGUAGE DeriveDataTypeable, GeneralizedNewtypeDeriving #-}
+{-# LANGUAGE GeneralizedNewtypeDeriving #-}
 module Oracles.PackageDeps (packageDeps, packageDepsOracle) where
 
 import qualified Data.HashMap.Strict as Map

src/Oracles/WindowsPath.hs

-{-# LANGUAGE DeriveDataTypeable, GeneralizedNewtypeDeriving #-}
+{-# LANGUAGE GeneralizedNewtypeDeriving #-}
 module Oracles.WindowsPath (
     fixAbsolutePathOnWindows, topDirectory, windowsPathOracle
     ) where

src/Package.hs

-{-# LANGUAGE DeriveGeneric, GeneralizedNewtypeDeriving, DeriveDataTypeable #-}
+{-# LANGUAGE DeriveGeneric, GeneralizedNewtypeDeriving #-}
 
 module Package (
     Package (..), PackageName (..), PackageType (..),

src/Settings/Builders/GhcCabal.hs

-{-# LANGUAGE DeriveDataTypeable, GeneralizedNewtypeDeriving #-}
+{-# LANGUAGE GeneralizedNewtypeDeriving #-}
 module Settings.Builders.GhcCabal (
     ghcCabalBuilderArgs, ghcCabalHsColourBuilderArgs, bootPackageDbArgs,
     PackageDbKey (..), cppArgs, needDll0