hlint: remove unneeded LANGUAGE pragmas

It seems disabling CPP and TemplateHaskell allows hlint to detect other
unused pragmas.

Author: snoyberg

src/Stack/Build/Cache.hs

@@ -1,7 +1,5 @@
 {-# LANGUAGE NoImplicitPrelude #-}
-{-# LANGUAGE DeriveGeneric         #-}
 {-# LANGUAGE MultiParamTypeClasses #-}
-{-# LANGUAGE TupleSections         #-}
 {-# LANGUAGE ConstraintKinds       #-}
 {-# LANGUAGE OverloadedStrings     #-}
 {-# LANGUAGE DataKinds             #-}

src/Stack/Build/Execute.hs

@@ -5,7 +5,6 @@
 {-# LANGUAGE MultiParamTypeClasses #-}
 {-# LANGUAGE OverloadedStrings     #-}
 {-# LANGUAGE RecordWildCards       #-}
-{-# LANGUAGE LambdaCase            #-}
 {-# LANGUAGE TypeFamilies          #-}
 {-# LANGUAGE ScopedTypeVariables   #-}
 {-# LANGUAGE RankNTypes            #-}

src/Stack/Config.hs

@@ -5,14 +5,10 @@
 {-# LANGUAGE DeriveFunctor #-}
 {-# LANGUAGE DeriveTraversable #-}
 {-# LANGUAGE ScopedTypeVariables #-}
-{-# LANGUAGE GeneralizedNewtypeDeriving #-}
 {-# LANGUAGE FlexibleContexts #-}
 {-# LANGUAGE OverloadedStrings #-}
 {-# LANGUAGE RecordWildCards #-}
-{-# LANGUAGE DeriveDataTypeable #-}
 {-# LANGUAGE TypeFamilies #-}
-{-# LANGUAGE LambdaCase #-}
-{-# LANGUAGE ViewPatterns #-}
 {-# LANGUAGE TupleSections #-}
 
 -- | The general Stack configuration that starts everything off. This should

src/Stack/Coverage.hs

@@ -5,7 +5,6 @@
 {-# LANGUAGE OverloadedStrings     #-}
 {-# LANGUAGE ScopedTypeVariables   #-}
 {-# LANGUAGE FlexibleInstances     #-}
-{-# LANGUAGE LambdaCase            #-}
 {-# LANGUAGE TupleSections         #-}
 
 -- | Generate HPC (Haskell Program Coverage) reports

src/Stack/Docker.hs

@@ -1,7 +1,14 @@
 {-# LANGUAGE NoImplicitPrelude #-}
-{-# LANGUAGE CPP, ConstraintKinds, DeriveDataTypeable, FlexibleContexts, MultiWayIf, NamedFieldPuns,
-             OverloadedStrings, PackageImports, RankNTypes, RecordWildCards, ScopedTypeVariables,
-             TupleSections #-}
+{-# LANGUAGE CPP #-}
+{-# LANGUAGE ConstraintKinds #-}
+{-# LANGUAGE FlexibleContexts #-}
+{-# LANGUAGE MultiWayIf #-}
+{-# LANGUAGE NamedFieldPuns #-}
+{-# LANGUAGE OverloadedStrings #-}
+{-# LANGUAGE RankNTypes #-}
+{-# LANGUAGE RecordWildCards #-}
+{-# LANGUAGE ScopedTypeVariables #-}
+{-# LANGUAGE TupleSections #-}
 
 -- | Run commands in Docker containers
 module Stack.Docker

src/Stack/GhcPkg.hs

@@ -3,8 +3,6 @@
 {-# LANGUAGE FlexibleContexts #-}
 {-# LANGUAGE BangPatterns #-}
 {-# LANGUAGE OverloadedStrings #-}
-{-# LANGUAGE DeriveDataTypeable #-}
-{-# LANGUAGE TupleSections #-}
 {-# OPTIONS -fno-warn-unused-do-bind #-}
 
 -- | Functions for the GHC package database.

src/Stack/Package.hs

@@ -1,5 +1,4 @@
 {-# LANGUAGE NoImplicitPrelude #-}
-{-# LANGUAGE LambdaCase #-}
 {-# LANGUAGE TupleSections #-}
 {-# LANGUAGE ScopedTypeVariables #-}
 {-# LANGUAGE FlexibleContexts #-}
@@ -8,7 +7,6 @@
 {-# LANGUAGE FlexibleInstances #-}
 {-# LANGUAGE OverloadedStrings #-}
 {-# LANGUAGE RankNTypes #-}
-{-# LANGUAGE ViewPatterns #-}
 {-# LANGUAGE RecordWildCards #-}
 
 -- | Dealing with Cabal.

src/Stack/PackageDump.hs

@@ -1,11 +1,9 @@
 {-# LANGUAGE NoImplicitPrelude #-}
 {-# LANGUAGE FlexibleContexts #-}
-{-# LANGUAGE GeneralizedNewtypeDeriving #-}
 {-# LANGUAGE RankNTypes #-}
 {-# LANGUAGE OverloadedStrings #-}
 {-# LANGUAGE TupleSections #-}
 {-# LANGUAGE DeriveDataTypeable #-}
-{-# LANGUAGE DeriveGeneric #-}
 module Stack.PackageDump
     ( Line
     , eachSection

src/Stack/Snapshot.hs

@@ -2,15 +2,11 @@
 {-# LANGUAGE ConstraintKinds     #-}
 {-# LANGUAGE DataKinds           #-}
 {-# LANGUAGE DeriveDataTypeable  #-}
-{-# LANGUAGE DeriveGeneric       #-}
-{-# LANGUAGE EmptyDataDecls      #-}
 {-# LANGUAGE FlexibleContexts    #-}
 {-# LANGUAGE GADTs               #-}
 {-# LANGUAGE OverloadedStrings   #-}
-{-# LANGUAGE RecordWildCards     #-}
 {-# LANGUAGE ScopedTypeVariables #-}
 {-# LANGUAGE TupleSections       #-}
-{-# LANGUAGE ViewPatterns        #-}
 
 -- | Reading in @SnapshotDef@s and converting them into
 -- @LoadedSnapshot@s.

src/Stack/Types/Config.hs

@@ -9,15 +9,12 @@
 {-# LANGUAGE FlexibleContexts #-}
 {-# LANGUAGE FlexibleInstances #-}
 {-# LANGUAGE GADTs #-}
-{-# LANGUAGE GeneralizedNewtypeDeriving #-}
 {-# LANGUAGE MultiParamTypeClasses #-}
 {-# LANGUAGE MultiWayIf #-}
 {-# LANGUAGE NoImplicitPrelude #-}
 {-# LANGUAGE OverloadedStrings #-}
 {-# LANGUAGE RecordWildCards #-}
 {-# LANGUAGE ScopedTypeVariables #-}
-{-# LANGUAGE StandaloneDeriving #-}
-{-# LANGUAGE TupleSections #-}
 {-# LANGUAGE TypeFamilies #-}
 {-# LANGUAGE ViewPatterns #-}
 

src/Stack/Types/TemplateName.hs

@@ -1,7 +1,5 @@
 {-# LANGUAGE NoImplicitPrelude #-}
-{-# LANGUAGE ViewPatterns #-}
 {-# LANGUAGE OverloadedStrings #-}
-{-# LANGUAGE GeneralizedNewtypeDeriving #-}
 
 -- | Template name handling.
 

src/Stack/Upgrade.hs

@@ -3,7 +3,6 @@
 {-# LANGUAGE FlexibleContexts      #-}
 {-# LANGUAGE MultiParamTypeClasses #-}
 {-# LANGUAGE OverloadedStrings     #-}
-{-# LANGUAGE RecordWildCards       #-}
 module Stack.Upgrade
     ( upgrade
     , UpgradeOpts