Klaus Jantzen <k.d.jantzen@mailbox.org> wrote:
> Warning (emacs): Unable to activate package ‘helm-core’.
> Required package ‘emacs-24.4’ is unavailable
> Warning (emacs): Unable to activate package ‘helm’.
> Required package ‘emacs-24.4’ is unavailable [2 times]

> What do I need 'helm' for?

Evidently, you do not need helm.

> What do I have to do to not receive these messages anymore?

M-x package-delete RET helm C-j