Remove descriptions of categories

The widget does not show descriptions. What do you mean?

I close this now as I got no answer for my question what exactly “remove descriptions” means.

However – as a hint:

In the code the category description is used for the title attribute of the category links:

printf('<li class="cat-item cat-item-%d"><a href="%s" title="%s">%s</a>%s</li>',
	$category->term_id,
	get_category_link($category->term_id),
	esc_attr($category->category_description),
	esc_html($category->cat_name),
	$postcount);

If one does not want the title, you can also use this code instead:

printf('<li class="cat-item cat-item-%d"><a href="%s" >%s</a>%s</li>',
	$category->term_id,
	get_category_link($category->term_id),
	esc_html($category->cat_name),
	$postcount);