scripts: Drop obsolete grabDescriptions.hs

We haven't used this for a while, and since we dropped descriptions in
X.D.Extending in favor of the haddock-generated index in
839302533b, it's useless.

scripts/grabDescriptions.hs

@@ -1,37 +0,0 @@
-#!/usr/bin/env runhaskell
-
-import Control.Applicative
-import Control.Arrow
-import Control.Monad
-import Data.Char
-import Data.List
-import Data.Maybe
-import System.Directory
-import System.Environment
-
--- needs haskell-src-exts
-import qualified Language.Haskell.Exts.Annotated as H
-
-getComments = (fmap . fmap) (map (\(H.Comment _ _ x) -> x) . snd)
-            . H.parseFileWithComments H.defaultParseMode
-
--- | Used to grab the description fields from all the modules in the current
--- directory for updating XMonad.Docs.Extending
-main = putStrLn . intercalate "\n"
-    =<< mapM (fmap . handleFailure description <*> getComments) =<< filterM doesFileExist . sort
-    =<< getDirectoryContents . fromMaybe "." . listToMaybe
-    =<< getArgs -- somehow only the "." fallback works...
-
-handleFailure :: (String -> [String] -> String) -> String -> H.ParseResult [String] -> String
-handleFailure f n (H.ParseOk x) = f n x
-handleFailure f n (H.ParseFailed _ msg) = n ++ " Parse Failure: " ++ msg
-
-description :: String -> [String] -> String
-description path xs =
-    let (hs,desc)
-            = uncurry (\x (y,descr) -> (x++y,takeWhile (not . or . sequence [null,("* Usage" `isInfixOf`),all (=='-'),all isSpace]) . dropWhile (all isSpace) $ descr))
-            . second (splitAt 1)
-            . break (isPrefixOf "Portability")
-            . map (dropWhile isSpace) $ concatMap lines xs
-        modName = maybe path (takeWhile (not . isSpace) . dropWhile isSpace . drop 1 . dropWhile (/=':')) $ find ("Module" `isInfixOf`) hs
-    in "* \""++modName++"\":\n"++unlines (map ("    "++) desc)