more RawFilePath conversion

nukeFile replaced with removeWhenExistsWith removeLink, which allows
using RawFilePath. Utility.Directory cannot use RawFilePath since setup
does not depend on posix.

This commit was sponsored by Graham Spencer on Patreon.

Utility/Directory.hs

@@ -142,15 +142,9 @@ moveFile src dest = tryIO (rename src dest) >>= onrename
 			(Right s) -> return $ isDirectory s
 #endif
 
-{- Removes a file (or symlink), which may or may not exist.
+{- Use with an action that removes something, which may or may not exist.
  -
- - Note that an exception is thrown if the file exists but
- - cannot be removed, or if its a directory. -}
-nukeFile :: FilePath -> IO ()
-nukeFile file = void $ tryWhenExists go
-  where
-#ifndef mingw32_HOST_OS
-	go = removeLink file
-#else
-	go = removeFile file
-#endif
+ - If an exception is thrown due to it not existing, it is ignored.
+ -}
+removeWhenExistsWith :: (a -> IO ()) -> a -> IO ()
+removeWhenExistsWith f a = void $ tryWhenExists $ f a