remove docstring

src/fileio.rs

@@ -46,17 +46,6 @@ fn car_less_than_car(a: &Cons, b: &Cons) -> Result<bool> {
 }
 
 #[defun]
-/* Return t if FILENAME names a directory you can open.
-This means that FILENAME must specify the name of a directory, and the
-directory must allow you to open files in it.  If this isn't the case,
-return nil.
-
-FILENAME can either be a directory name (eg. \"/tmp/foo/\") or the
-file name of a file which is a directory (eg. \"/tmp/foo\", without
-the final slash).
-
-In order to use a directory as a buffer's current directory, this
-predicate must return true.  */
 fn file_accessible_directory_p(filename: &str) -> bool {
   let path = Path::new(filename);
   path.exists() && path.is_dir()