Use implicit Prelude (#6187)

* Use implicit Prelude

The previous behavior was introduced as a fix for #4464. It seems that
this change alone did not fix the issue, and `stack ghci` and `cabal
repl` only work with GHC 8.4.1 or newer, as no custom Prelude is loaded
for these versions. Given this, it seems cleaner to revert to the
implicit Prelude.

* PandocMonad: remove outdated check for base version

Only base versions 4.9 and later are supported, the check for
`MIN_VERSION_base(4,8,0)` is therefore unnecessary.

* Always use custom prelude

Previously, the custom prelude was used only with older GHC versions, as
a workaround for problems with ghci. The ghci problems are resolved by
replacing package `base` with `base-noprelude`, allowing for consistent
use of the custom prelude across all GHC versions.

6 files changed, 0 insertions, 12 deletions

diff --git a/src/Text/Pandoc/Readers/Docx/Combine.hs b/src/Text/Pandoc/Readers/Docx/Combine.hs
index c4c9332cd..54736cd0e 100644
--- a/src/Text/Pandoc/Readers/Docx/Combine.hs
+++ b/src/Text/Pandoc/Readers/Docx/Combine.hs
@@ -1,4 +1,3 @@
-{-# LANGUAGE NoImplicitPrelude    #-}
 {-# LANGUAGE FlexibleInstances    #-}
 {-# LANGUAGE PatternGuards        #-}
 {-# LANGUAGE OverloadedStrings    #-}
@@ -59,7 +58,6 @@ module Text.Pandoc.Readers.Docx.Combine ( smushInlines
                                         )
        where
 
-import Prelude
 import Data.List
 import Data.Sequence (ViewL (..), ViewR (..), viewl, viewr, (><), (|>))
 import qualified Data.Sequence as Seq (null)
diff --git a/src/Text/Pandoc/Readers/Docx/Fields.hs b/src/Text/Pandoc/Readers/Docx/Fields.hs
index ad17e9b54..442bc3466 100644
--- a/src/Text/Pandoc/Readers/Docx/Fields.hs
+++ b/src/Text/Pandoc/Readers/Docx/Fields.hs
@@ -1,4 +1,3 @@
-{-# LANGUAGE NoImplicitPrelude #-}
 {-# LANGUAGE OverloadedStrings #-}
 {- |
    Module      : Text.Pandoc.Readers.Docx.Fields
@@ -16,7 +15,6 @@ module Text.Pandoc.Readers.Docx.Fields ( FieldInfo(..)
                                        , parseFieldInfo
                                        ) where
 
-import Prelude
 import Data.Functor (($>), void)
 import qualified Data.Text as T
 import Text.Parsec
diff --git a/src/Text/Pandoc/Readers/Docx/Lists.hs b/src/Text/Pandoc/Readers/Docx/Lists.hs
index c3e780bc6..e63f8457e 100644
--- a/src/Text/Pandoc/Readers/Docx/Lists.hs
+++ b/src/Text/Pandoc/Readers/Docx/Lists.hs
@@ -1,4 +1,3 @@
-{-# LANGUAGE NoImplicitPrelude #-}
 {-# LANGUAGE OverloadedStrings #-}
 {- |
    Module      : Text.Pandoc.Readers.Docx.Lists
@@ -18,7 +17,6 @@ module Text.Pandoc.Readers.Docx.Lists ( blocksToBullets
                                       , listParagraphStyles
                                       ) where
 
-import Prelude
 import Data.List
 import Data.Maybe
 import Data.String (fromString)
diff --git a/src/Text/Pandoc/Readers/Docx/Parse.hs b/src/Text/Pandoc/Readers/Docx/Parse.hs
index 5f417dfeb..199ca6d03 100644
--- a/src/Text/Pandoc/Readers/Docx/Parse.hs
+++ b/src/Text/Pandoc/Readers/Docx/Parse.hs
@@ -1,4 +1,3 @@
-{-# LANGUAGE NoImplicitPrelude #-}
 {-# LANGUAGE ViewPatterns      #-}
 {-# LANGUAGE OverloadedStrings #-}
 {- |
@@ -52,7 +51,6 @@ module Text.Pandoc.Readers.Docx.Parse ( Docx(..)
                                       , constructBogusParStyleData
                                       , leftBiasedMergeRunStyle
                                       ) where
-import Prelude
 import Text.Pandoc.Readers.Docx.Parse.Styles
 import Codec.Archive.Zip
 import Control.Applicative ((<|>))
diff --git a/src/Text/Pandoc/Readers/Docx/Parse/Styles.hs b/src/Text/Pandoc/Readers/Docx/Parse/Styles.hs
index bfe516f82..bfbc65cb0 100644
--- a/src/Text/Pandoc/Readers/Docx/Parse/Styles.hs
+++ b/src/Text/Pandoc/Readers/Docx/Parse/Styles.hs
@@ -1,4 +1,3 @@
-{-# LANGUAGE NoImplicitPrelude #-}
 {-# LANGUAGE FlexibleInstances #-}
 {-# LANGUAGE FlexibleContexts  #-}
 {-# LANGUAGE TypeFamilies      #-}
@@ -43,7 +42,6 @@ module Text.Pandoc.Readers.Docx.Parse.Styles (
   , defaultRunStyle
   , checkOnOff
   ) where
-import Prelude
 import Codec.Archive.Zip
 import Control.Applicative ((<|>))
 import Control.Monad.Except
diff --git a/src/Text/Pandoc/Readers/Docx/Util.hs b/src/Text/Pandoc/Readers/Docx/Util.hs
index 3fe7e5edf..a573344ff 100644
--- a/src/Text/Pandoc/Readers/Docx/Util.hs
+++ b/src/Text/Pandoc/Readers/Docx/Util.hs
@@ -1,4 +1,3 @@
-{-# LANGUAGE NoImplicitPrelude #-}
 {- |
    Module      : Text.Pandoc.Readers.Docx.StyleMaps
    Copyright   : © 2014-2020 Jesse Rosenthal <jrosenthal@jhu.edu>,
@@ -24,7 +23,6 @@ module Text.Pandoc.Readers.Docx.Util (
                                       , findAttrTextByName
                                       ) where
 
-import Prelude
 import Data.Maybe (mapMaybe)
 import qualified Data.Text as T
 import Text.XML.Light