Add compiler linting to CI

This commit adds the `lint:compiler` Hadrian target to the CI runner.
It does also fixes hints in the compiler/ and libraries/base/ codebases.

1 files changed, 7 insertions, 9 deletions

diff --git a/compiler/Language/Haskell/Syntax/Decls.hs b/compiler/Language/Haskell/Syntax/Decls.hs
index 81369c3b09..0b93e4b265 100644
--- a/compiler/Language/Haskell/Syntax/Decls.hs
+++ b/compiler/Language/Haskell/Syntax/Decls.hs
@@ -1,13 +1,11 @@
-{-# LANGUAGE CPP                 #-}
-{-# LANGUAGE ConstraintKinds     #-}
-{-# LANGUAGE DeriveDataTypeable  #-}
-{-# LANGUAGE DeriveTraversable   #-}
-{-# LANGUAGE FlexibleContexts    #-}
-{-# LANGUAGE FlexibleInstances   #-}
+{-# LANGUAGE CPP #-}
+{-# LANGUAGE ConstraintKinds #-}
+{-# LANGUAGE DeriveDataTypeable #-}
+{-# LANGUAGE FlexibleContexts #-}
+{-# LANGUAGE FlexibleInstances #-}
 {-# LANGUAGE ScopedTypeVariables #-}
-{-# LANGUAGE StandaloneDeriving  #-}
-{-# LANGUAGE TypeApplications    #-}
-{-# LANGUAGE TypeFamilies        #-}
+{-# LANGUAGE TypeApplications #-}
+{-# LANGUAGE TypeFamilies #-}
 {-# LANGUAGE UndecidableInstances #-} -- Wrinkle in Note [Trees That Grow]
                                       -- in module Language.Haskell.Syntax.Extension
 {-# LANGUAGE ViewPatterns #-}