Removing Uninstalled Add-On's Completely

[Alfuzzy]

I uninstalled a couple add-on's recently (wanted to completely remove them from the site). But after uninstalling them...in the AdminCP Add-On area...the uninstalled add-on moves to the top of the add-on list...and now is listed under the heading "Installable add-on's" (screenshot below).

I would rather not have this...how to I get rid this "Installable Add-On's" section/list?

In case it helps...running XF 2.1.12.

Thanks