code: public static void deleteFile(@Nonnull File f) throws IOException {
          newPathRemover(PathRemover.PathChecker.ALLOW_ALL).forceRemoveFile(fileToPath(f));
      }
docs: Deletes this file (and does not take no for an answer).
  If necessary, it will have multiple attempts at deleting things.
  
  @param f a file to delete
  @throws IOException if it exists but could not be successfully deleted