remove update script, moved to own repository

https://github.com/koala-framework/kwf-upgrade
Merge branch '3.4' into 3.5
remove update script, moved to own repository

https://github.com/koala-framework/kwf-upgrade
Merge branch '3.5' into 3.6

Conflicts:
	scripts/update-to-3.4.php
remove update script, moved to own repository

https://github.com/koala-framework/kwf-upgrade