Revert "expose new Word operation to swap endianness for Word{16,32,64}"

This reverts commit 3ef0f91.

Data/Word.hs

@@ -22,9 +22,6 @@ module Data.Word
         Word,
         Word8, Word16, Word32, Word64,
 
-        -- * byte swapping
-        byteSwap16, byteSwap32, byteSwap64,
-
         -- * Notes
 
         -- $notes
@@ -36,21 +33,6 @@ import GHC.Word
 
 #ifdef __HUGS__
 import Hugs.Word
-
-byteSwap16 :: Word16 -> Word16
-byteSwap16 w = (w `shift` -8) .|. (w `shift` 8)
-
-byteSwap32 :: Word32 -> Word32
-byteSwap32 w =
-         (w `shift` -24)             .|. (w `shift` 24)
-    .|. ((w `shift` -8) .&. 0xff00) .|. ((w .&. 0xff00) `shift` 8)
-
-byteSwap64 :: Word64 -> Word64
-byteSwap64 w =
-        (w `shift` -56)                  .|. (w `shift` 56)
-    .|. ((w `shift` -40) .&. 0xff00)     .|. ((w .&. 0xff00) `shift` 40)
-    .|. ((w `shift` -24) .&. 0xff0000)   .|. ((w .&. 0xff0000) `shift` 24)
-    .|. ((w `shift` -8)  .&. 0xff000000) .|. ((w .&. 0xff000000) `shift` 8)
 #endif
 
 {- $notes

GHC/Word.hs

@@ -23,10 +23,7 @@
 module GHC.Word (
     Word(..), Word8(..), Word16(..), Word32(..), Word64(..),
     uncheckedShiftL64#,
-    uncheckedShiftRL64#,
-    byteSwap16,
-    byteSwap32,
-    byteSwap64
+    uncheckedShiftRL64#
     ) where
 
 import Data.Bits
@@ -303,9 +300,6 @@ instance Bits Word16 where
 instance FiniteBits Word16 where
     finiteBitSize _ = 16
 
-byteSwap16 :: Word16 -> Word16
-byteSwap16 (W16# w#) = W16# (byteSwap16# w#)
-
 {-# RULES
 "fromIntegral/Word8->Word16"   fromIntegral = \(W8# x#) -> W16# x#
 "fromIntegral/Word16->Word16"  fromIntegral = id :: Word16 -> Word16
@@ -530,9 +524,6 @@ instance Read Word32 where
     readsPrec p s = [(fromIntegral (x::Int), r) | (x, r) <- readsPrec p s]
 #endif
 
-byteSwap32 :: Word32 -> Word32
-byteSwap32 (W32# w#) = W32# (byteSwap32# w#)
-
 ------------------------------------------------------------------------
 -- type Word64
 ------------------------------------------------------------------------
@@ -781,10 +772,3 @@ instance Ix Word64 where
 instance Read Word64 where
     readsPrec p s = [(fromInteger x, r) | (x, r) <- readsPrec p s]
 
-#if WORD_SIZE_IN_BITS < 64
-byteSwap64 :: Word64 -> Word64
-byteSwap64 (W64# w#) = W64# (byteSwap64# w#)
-#else
-byteSwap64 :: Word64 -> Word64
-byteSwap64 (W64# w#) = W64# (byteSwap# w#)
-#endif