If you remove this limit, I’d think about marking the page with “noindex” if you’re worried about SEO.
Additionally, you can change the tag cloud limit to a number less than 45 too.
$args[number] = 10; // New limit for number of tags
The tag cloud widget isn’t used much now as it was about 5 years ago. There are warnings that it could cause a negative impact on SEO due to “keyword” stuffing.