prune language UndecidableInstances

This are files that can drop it.

Author: Anton-Latukha

src/Nix/Thunk.hs

@@ -2,7 +2,6 @@
 {-# LANGUAGE FlexibleContexts #-}
 {-# LANGUAGE FunctionalDependencies #-}
 {-# LANGUAGE TypeFamilies #-}
-{-# LANGUAGE UndecidableInstances #-}
 
 module Nix.Thunk where
 

src/Nix/Value/Equal.hs

@@ -19,7 +19,6 @@
 {-# LANGUAGE TypeApplications #-}
 {-# LANGUAGE TypeFamilies #-}
 {-# LANGUAGE TypeOperators #-}
-{-# LANGUAGE UndecidableInstances #-}
 {-# LANGUAGE ViewPatterns #-}
 
 {-# OPTIONS_GHC -Wno-orphans #-}

tests/EvalTests.hs

@@ -3,7 +3,6 @@
 {-# LANGUAGE QuasiQuotes #-}
 {-# LANGUAGE ScopedTypeVariables #-}
 {-# LANGUAGE TemplateHaskell #-}
-{-# LANGUAGE UndecidableInstances #-}
 
 {-# OPTIONS_GHC -Wno-missing-signatures -Wno-orphans #-}
 

tests/PrettyParseTests.hs

@@ -5,7 +5,6 @@
 {-# LANGUAGE MonoLocalBinds #-}
 {-# LANGUAGE NoMonomorphismRestriction #-}
 {-# LANGUAGE OverloadedStrings #-}
-{-# LANGUAGE UndecidableInstances #-}
 
 {-# OPTIONS -Wno-orphans#-}