Remove non hierarchical test for sticky in post table hidden fields

[nicolasrenard]

When you enabled sticky feature for custom posts or pages, the checkbox in quick edit links for hierarchical post types (so like pages) doesn't work.

That's because there is a test on hierarchical type to add the sticky div (/wp-admin/includes/template.php:333).

Why such a test while there is an is_sticky() test inside ?

Is this test really useful ? I think it could be removed.