Remove bulk action checkbox for Super Admin

[UmeshSingla]

The Bulk action checkbox serves no purpose for Super Admins in a multisite or admin in a normal site.

The only action allowed for Superadmin in a multisite is to mark it as not spam, which is doubtful in its place, Why should a spam user be allowed to get Superadmin privileges in first place?

I suggest to add a filter with default value as false to hide the bulk action checkbox for Superadmins or just not show it permanently without any filter.

If it is suppose to be considered, I can submit a patch

[Clorith]

Which screen are you referencing here that only has a mark as not spam option?

[jeremyfelt]

This makes sense. We do the same thing with a network's main site right now in the sites list table. If we aren't going to allow the action here, we can make it easier not to accidentally select it.

[bordoni]

I create a solution that removes the Checkbox, attached the .diff

PS: Not 100% sure if I should add dev-feedback, If I did it wrong, please let me know for the next time.

[bordoni]

Version 01

[SergeyBiryukov]

Looks good.

[SergeyBiryukov]

In 33777:

Network Admin: Hide the bulk actions checkbox for super admins.

See [25125] for hiding the checkbox for the main site in Sites table.

props bordoni.
fixes #28529.