uio: remove the unused iov_for_each macro

  - 'idr_for_each_entry_ul'

  - 'inet_bind_bucket_for_each'

  - 'inet_lhash2_for_each_icsk_rcu'

  - 'iov_for_each'

  - 'key_for_each'

  - 'key_for_each_safe'

  - 'klp_for_each_func'

	};

}

#define iov_for_each(iov, iter, start)				\

	if (iov_iter_type(start) == ITER_IOVEC ||		\

	    iov_iter_type(start) == ITER_KVEC)			\

	for (iter = (start);					\

	     (iter).count &&					\

	     ((iov = iov_iter_iovec(&(iter))), 1);		\

	     iov_iter_advance(&(iter), (iov).iov_len))

size_t iov_iter_copy_from_user_atomic(struct page *page,

		struct iov_iter *i, unsigned long offset, size_t bytes);

void iov_iter_advance(struct iov_iter *i, size_t bytes);