lib, web: remove obsolete conditionals for old GHC

hledger-lib/Hledger/Utils/Debug.hs

@@ -10,9 +10,7 @@
 module Hledger.Utils.Debug (
   module Hledger.Utils.Debug
   ,module Debug.Trace
-#if __GLASGOW_HASKELL__ >= 704
   ,ppShow
-#endif
 )
 where
 
@@ -28,14 +26,7 @@ import           System.Exit
 import           System.IO.Unsafe (unsafePerformIO)
 import           Text.Megaparsec
 import           Text.Printf
-
-#if __GLASGOW_HASKELL__ >= 704
 import           Text.Show.Pretty (ppShow)
-#else
--- the required pretty-show version requires GHC >= 7.4
-ppShow :: Show a => a -> String
-ppShow = show
-#endif
 
 pprint :: Show a => a -> IO ()
 pprint = putStrLn . ppShow

hledger-lib/Hledger/Utils/UTF8IOCompat.hs

@@ -44,10 +44,6 @@ where
 -- import qualified Data.ByteString.Lazy.UTF8 as U8 (toString, fromString)
 import Prelude hiding (readFile, writeFile, appendFile, getContents, putStr, putStrLn)
 import System.IO -- (Handle)
--- #if __GLASGOW_HASKELL__ < 702
--- import Codec.Binary.UTF8.String as UTF8 (decodeString, encodeString, isUTF8Encoded)
--- import System.Info (os)
--- #endif
 
 -- bom :: B.ByteString
 -- bom = B.pack [0xEF, 0xBB, 0xBF]
@@ -100,24 +96,12 @@ type SystemString = String
 -- | Convert a system string to an ordinary string, decoding from UTF-8 if
 -- it appears to be UTF8-encoded and GHC version is less than 7.2.
 fromSystemString :: SystemString -> String
--- #if __GLASGOW_HASKELL__ < 702
--- fromSystemString s = if UTF8.isUTF8Encoded s then UTF8.decodeString s else s
--- #else
 fromSystemString = id
--- #endif
 
 -- | Convert a unicode string to a system string, encoding with UTF-8 if
 -- we are on a posix platform with GHC < 7.2.
 toSystemString :: String -> SystemString
--- #if __GLASGOW_HASKELL__ < 702
--- toSystemString = case os of
---                      "unix" -> UTF8.encodeString
---                      "linux" -> UTF8.encodeString
---                      "darwin" -> UTF8.encodeString
---                      _ -> id
--- #else
 toSystemString = id
--- #endif
 
 -- | A SystemString-aware version of error.
 error' :: String -> a

hledger-web/Import.hs

@@ -17,17 +17,4 @@ import           Settings             as Import
 import           Settings.Development as Import
 import           Settings.StaticFiles as Import
 
-#if __GLASGOW_HASKELL__ >= 704
+import           Data.Monoid          as Import ((<>))
-import           Data.Monoid          as Import (
-#if !MIN_VERSION_base(4,8,0)
-                                                 Monoid (mappend, mempty, mconcat),
-#endif
-                                                 (<>))
-#else
-import           Data.Monoid          as Import
-                                                 (Monoid (mappend, mempty, mconcat))
-
-infixr 5 <>
-(<>) :: Monoid m => m -> m -> m
-(<>) = mappend
-#endif