Clean up warnings

  * unused imports
  * imports of `Data.List` without import lists
  * missing `CompatPrelude` file in `.cabal`

4 files changed, 3 insertions, 5 deletions

diff --git a/haddock-api/src/Haddock/Interface/AttachInstances.hs b/haddock-api/src/Haddock/Interface/AttachInstances.hs
index 35f24ee5..685dca01 100644
--- a/haddock-api/src/Haddock/Interface/AttachInstances.hs
+++ b/haddock-api/src/Haddock/Interface/AttachInstances.hs
@@ -21,7 +21,7 @@ import Haddock.GhcUtils
 
 import Control.Applicative ((<|>))
 import Control.Arrow hiding ((<+>))
-import Data.List
+import Data.List (sortBy)
 import Data.Ord (comparing)
 import Data.Maybe ( maybeToList, mapMaybe, fromMaybe )
 import qualified Data.Map as Map
diff --git a/haddock-api/src/Haddock/Interface/Create.hs b/haddock-api/src/Haddock/Interface/Create.hs
index d5cbdaf5..b182a615 100644
--- a/haddock-api/src/Haddock/Interface/Create.hs
+++ b/haddock-api/src/Haddock/Interface/Create.hs
@@ -32,7 +32,7 @@ import Data.Bifunctor
 import Data.Bitraversable
 import qualified Data.Map as M
 import Data.Map (Map)
-import Data.List
+import Data.List (find, foldl', sortBy)
 import Data.Maybe
 import Data.Ord
 import Control.Applicative
diff --git a/haddock-api/src/Haddock/Interface/LexParseRn.hs b/haddock-api/src/Haddock/Interface/LexParseRn.hs
index 0b40ed3c..08a3c0f8 100644
--- a/haddock-api/src/Haddock/Interface/LexParseRn.hs
+++ b/haddock-api/src/Haddock/Interface/LexParseRn.hs
@@ -22,7 +22,7 @@ module Haddock.Interface.LexParseRn
 import Control.Arrow
 import Control.Monad
 import Data.Functor (($>))
-import Data.List
+import Data.List (maximumBy, (\\))
 import Data.Ord
 import Documentation.Haddock.Doc (metaDocConcat)
 import DynFlags (languageExtensions)
diff --git a/haddock-api/src/Haddock/Interface/Rename.hs b/haddock-api/src/Haddock/Interface/Rename.hs
index 72d063dc..0b122b07 100644
--- a/haddock-api/src/Haddock/Interface/Rename.hs
+++ b/haddock-api/src/Haddock/Interface/Rename.hs
@@ -22,14 +22,12 @@ import Haddock.Types
 import Bag (emptyBag)
 import GHC hiding (NoLink)
 import Name
-import Outputable ( panic )
 import RdrName (RdrName(Exact))
 import TysWiredIn (eqTyCon_RDR)
 
 import Control.Applicative
 import Control.Arrow ( first )
 import Control.Monad hiding (mapM)
-import Data.List
 import qualified Data.Map as Map hiding ( Map )
 import Prelude hiding (mapM)