lib/littlefs: Remove assignment of variables to themselves.

To prevent compiler warnings (eg on clang).

Signed-off-by: Damien George <damien@micropython.org>

lib/littlefs/lfs2.c

@@ -865,11 +865,6 @@ static int lfs2_dir_traverse(lfs2_t *lfs2,
                 };
                 sp += 1;
 
-                dir = dir;
-                off = off;
-                ptag = ptag;
-                attrs = attrs;
-                attrcount = attrcount;
                 tmask = 0;
                 ttag = 0;
                 begin = 0;