erofs: remove unnecessary enum entries

Opt_nouser_xattr and Opt_noacl are useless, so just remove them.
Signed-off-by: Chengguang Xu <cgxu519@mykernel.net>
Reviewed-by: Gao Xiang <hsiangkao@redhat.com>
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Link: https://lore.kernel.org/r/20201005071550.66193-1-cgxu519@mykernel.netSigned-off-by: Gao Xiang <hsiangkao@redhat.com>

fs/erofs/super.c

@@ -211,9 +211,7 @@ static void erofs_default_options(struct erofs_fs_context *ctx)
 
 enum {
 	Opt_user_xattr,
-	Opt_nouser_xattr,
 	Opt_acl,
-	Opt_noacl,
 	Opt_cache_strategy,
 	Opt_err
 };