Revert "Allow failed download of eula for betas"

This reverts commit 19939a8d2a165a34e034f09dab42b105cf7a4d2f.

Conflicts:
	src/lib/registration/ui/addon_eula_dialog.rb
changes

- 3.1.79
Merge pull request #118 from yast/remove_eula_download_workaround

Remove EULA download workaround