[various] Remove redundant uninstall functions

- All hooks (current and obsolete) are removed automatically during addon uninstall

notifyall/notifyall.php

@@ -15,16 +15,6 @@ use Friendica\Core\Logger;
 use Friendica\Core\Renderer;
 use Friendica\DI;
 
-function notifyall_install()
-{
-	Logger::log("installed notifyall");
-}
-
-function notifyall_uninstall()
-{
-	Logger::log("removed notifyall");
-}
-
 function notifyall_module() {}
 
 function notifyall_addon_admin(App $a, &$o)