Remove unused imports (with newer protolude)

The changes here are from fixing stack build with LTS 15.8 (GHC 8.8.3)
to be warning-free. Most if not all come from the newer protolude
version, which adds some things like `unwords`.

So to make sure that we don't get unused import warnings with newer
stackage, this both raises the protolude lower bound and removes
these imports.

main/Main.hs

@@ -17,8 +17,7 @@ import Data.IORef               (IORef, atomicWriteIORef, newIORef,
                                  readIORef)
 import Data.String              (IsString (..))
 import Data.Text                (pack, replace, strip, stripPrefix)
-import Data.Text.Encoding       (decodeUtf8, encodeUtf8)
-import Data.Text.IO             (hPutStrLn, readFile)
+import Data.Text.IO             (hPutStrLn)
 import Data.Time.Clock          (getCurrentTime)
 import Network.Wai.Handler.Warp (defaultSettings, runSettings,
                                  setHost, setPort, setServerName)

postgrest.cabal

@@ -72,7 +72,7 @@ library
                     , network-uri               >= 2.6.1 && < 2.7
                     , optparse-applicative      >= 0.13 && < 0.16
                     , parsec                    >= 3.1.11 && < 3.2
-                    , protolude                 >= 0.2.2 && < 0.3
+                    , protolude                 >= 0.2.4 && < 0.3
                     , regex-tdfa                >= 1.2.2 && < 1.4
                     , scientific                >= 0.3.4 && < 0.4
                     , swagger2                  >= 2.4 && < 2.6
@@ -103,7 +103,7 @@ executable postgrest
                     , hasql-transaction >= 0.7.2 && < 1.1
                     , network           < 3.2
                     , postgrest
-                    , protolude         >= 0.2.2 && < 0.3
+                    , protolude         >= 0.2.4 && < 0.3
                     , retry             >= 0.7.4 && < 0.9
                     , text              >= 1.2.2 && < 1.3
                     , time              >= 1.6 && < 1.10
@@ -178,7 +178,7 @@ test-suite spec
                     , monad-control     >= 1.0.1 && < 1.1
                     , postgrest
                     , process           >= 1.4.2 && < 1.7
-                    , protolude         >= 0.2.2 && < 0.3
+                    , protolude         >= 0.2.4 && < 0.3
                     , regex-tdfa        >= 1.2.2 && < 1.4
                     , text              >= 1.2.2 && < 1.3
                     , time              >= 1.6 && < 1.10
@@ -222,7 +222,7 @@ Test-Suite spec-querycost
                      , monad-control     >= 1.0.1 && < 1.1
                      , postgrest
                      , process           >= 1.4.2 && < 1.7
-                     , protolude         >= 0.2.2 && < 0.3
+                     , protolude         >= 0.2.4 && < 0.3
                      , regex-tdfa        >= 1.2.2 && < 1.4
                      , text              >= 1.2.2 && < 1.3
                      , time              >= 1.6 && < 1.10

src/PostgREST/ApiRequest.hs

@@ -28,8 +28,8 @@ import qualified Data.Vector          as V
 
 import Control.Arrow             ((***))
 import Data.Aeson.Types          (emptyArray, emptyObject)
-import Data.List                 (elem, last, lookup, partition)
-import Data.List.NonEmpty        (NonEmpty, head)
+import Data.List                 (last, lookup, partition)
+import Data.List.NonEmpty        (head)
 import Data.Maybe                (fromJust)
 import Data.Ranged.Ranges        (Range (..), emptyRange,
                                   rangeIntersection)

src/PostgREST/App.hs

@@ -40,7 +40,6 @@ import Network.HTTP.Types.Status
 import Network.Wai
 
 import PostgREST.ApiRequest       (Action (..), ApiRequest (..),
-                                   ContentType (..),
                                    InvokeMethod (..), Target (..),
                                    mutuallyAgreeable, userApiRequest)
 import PostgREST.Auth             (containsRole, jwtClaims,

src/PostgREST/Config.hs

@@ -37,12 +37,11 @@ import Control.Lens                (preview)
 import Control.Monad               (fail)
 import Crypto.JWT                  (StringOrURI, stringOrUri)
 import Data.List                   (lookup)
-import Data.List.NonEmpty          (NonEmpty, fromList)
+import Data.List.NonEmpty          (fromList)
 import Data.Scientific             (floatingOrInteger)
 import Data.Text                   (dropEnd, dropWhileEnd,
-                                    intercalate, lines, splitOn,
-                                    strip, take, unpack)
-import Data.Text.Encoding          (encodeUtf8)
+                                    intercalate, splitOn, strip, take,
+                                    unpack)
 import Data.Text.IO                (hPutStrLn)
 import Data.Version                (versionBranch)
 import Development.GitRev          (gitHash)

src/PostgREST/Error.hs

@@ -23,7 +23,6 @@ import qualified Network.HTTP.Types.Status as HT
 
 import Data.Aeson  ((.=))
 import Network.Wai (Response, responseLBS)
-import Text.Read   (readMaybe)
 
 import Network.HTTP.Types.Header
 

src/PostgREST/Parsers.hs

@@ -9,10 +9,8 @@ module PostgREST.Parsers where
 import qualified Data.HashMap.Strict as M
 import qualified Data.Set            as S
 
-import Control.Monad           ((>>))
 import Data.Either.Combinators (mapLeft)
 import Data.Foldable           (foldl1)
-import Data.Functor            (($>))
 import Data.List               (init, last)
 import Data.Text               (intercalate, replace, strip)
 import Text.Read               (read)

src/PostgREST/Private/QueryFragment.hs

@@ -11,7 +11,7 @@ import qualified Data.HashMap.Strict           as HM
 import           Data.Maybe
 import           Data.Text                     (intercalate,
                                                 isInfixOf, replace,
-                                                toLower, unwords)
+                                                toLower)
 import qualified Data.Text                     as T (map, null,
                                                      takeWhile)
 import           PostgREST.Types

src/PostgREST/QueryBuilder.hs

@@ -22,7 +22,7 @@ module PostgREST.QueryBuilder (
 
 import qualified Data.Set as S
 
-import Data.Text (intercalate, unwords)
+import Data.Text (intercalate)
 import Data.Tree (Tree (..))
 
 import Data.Maybe

src/PostgREST/Statements.hs

@@ -22,8 +22,6 @@ import           Data.Aeson                      as JSON
 import qualified Data.Aeson.Lens                 as L
 import qualified Data.ByteString.Char8           as BS
 import           Data.Maybe
-import           Data.Text                       (unwords)
-import           Data.Text.Encoding              (encodeUtf8)
 import qualified Hasql.Decoders                  as HD
 import qualified Hasql.Encoders                  as HE
 import qualified Hasql.Statement                 as H

stack.yaml

@@ -18,3 +18,4 @@ extra-deps:
   - configurator-pg-0.2.0@sha256:08dcfadbe31e9e505d0bed1ab034105e1735141499734ad52d1c5ac980cde4a6,2939
   - hspec-wai-0.10.1@sha256:56dd9ec1d56f47ef1946f71f7cbf070e4c285f718cac1b158400ae5e7172ef47,2290
   - hspec-wai-json-0.10.1@sha256:67b405c38f0a9e2771480c8d3ecd8aeb8d8776a35d3b2906cb1b76c9538617e4,1629
+  - protolude-0.2.4@sha256:8bcf18da79be0832fccdd4cd5770e20baa4caec61c141d7119632a830b4096a9,2191

stack.yaml.lock

@@ -39,6 +39,13 @@ packages:
       sha256: fb9e89b79cde3276baa484c860c6b9eeebdbc1a5c43301293351a25bc4c08e87
   original:
     hackage: hspec-wai-json-0.10.1@sha256:67b405c38f0a9e2771480c8d3ecd8aeb8d8776a35d3b2906cb1b76c9538617e4,1629
+- completed:
+    hackage: protolude-0.2.4@sha256:8bcf18da79be0832fccdd4cd5770e20baa4caec61c141d7119632a830b4096a9,2191
+    pantry-tree:
+      size: 1438
+      sha256: 9d8560e5514bac03fa00a37195d683ee628169a502c263b8d94588bfeb0ba097
+  original:
+    hackage: protolude-0.2.4@sha256:8bcf18da79be0832fccdd4cd5770e20baa4caec61c141d7119632a830b4096a9,2191
 snapshots:
 - completed:
     size: 523878

test/Feature/ConcurrentSpec.hs

@@ -5,7 +5,6 @@
 module Feature.ConcurrentSpec where
 
 import Control.Concurrent.Async (mapConcurrently)
-import Control.Monad            (void)
 import Network.Wai              (Application)
 
 import Control.Monad.Base

test/Feature/InsertSpec.hs

@@ -2,7 +2,6 @@ module Feature.InsertSpec where
 
 import qualified Data.Aeson as JSON
 
-import Control.Monad          (replicateM_, void)
 import Data.List              (lookup)
 import Data.Maybe             (fromJust)
 import Network.Wai            (Application)

test/Feature/UnicodeSpec.hs

@@ -1,7 +1,6 @@
 module Feature.UnicodeSpec where
 
-import Control.Monad (void)
-import Network.Wai   (Application)
+import Network.Wai (Application)
 
 import Test.Hspec
 import Test.Hspec.Wai

test/SpecHelper.hs

@@ -7,7 +7,6 @@ import qualified Data.Map.Strict        as M
 import qualified Data.Set               as S
 import qualified System.IO.Error        as E
 
-import Control.Monad        (void)
 import Data.Aeson           (Value (..), decode, encode)
 import Data.CaseInsensitive (CI (..))
 import Data.List            (lookup)