So you want to remove the End-Of-Support message that is shown in Joomla 2.5.28 right?
The message is generated through a Quickicon plugin after upgrading to Joomla 2.5.8. But for some reason you want it removed.
Of course you can manually unpublish or uninstall the quickicon plugin, but what if you manage your websites through a service like Watchful.li? After upgrading all your sites to Joomla 2.5.28 you would have to login into every site and unpublish or uninstall the quickicon plugin.
I wrote a small plugin that can do just that for you. This plugin comes in two flavours:
When you install these plugins, they will immediately uninstall or unpublish the End-Of-Support quickicon plugin. No questions asked! After doing that the plugins uninstall themselves too so there are no leftovers.
If you want to keep the End-Of-Support Notifier quickicon but only unpublish it, make sure you use the unpublish plugin and not the uninstall plugin!