Remove convert script

doc/tutorial/convert.hs

@@ -1,30 +0,0 @@
-
-import           Control.Arrow
-import           Data.Foldable
-import           Data.List
-import           System.Environment
-
-main = do
-  files <- getArgs
-  forM_ files $ \ file -> do
-    convertM file
-
-convertM :: FilePath -> IO ()
-convertM file = do
-  contents <- readFile file
-  seq (length contents) (return ())
-  writeFile file (convert contents)
-
-convert :: String -> String
-convert =
-  lines >>>
-  groupBy (\ a b -> take 1 a == take 1 b) >>>
-  map go >>>
-  concat >>>
-  unlines
-  where
-    go :: [String] -> [String]
-    go (a : r)
-      | ">" `isPrefixOf` a
-        = "``` haskell ignore" : map (drop 2) (a : r) ++ "```" : []
-    go x = x