MoroS [1] filed a deletion request for electron-bin [2]:

Now that electron is in the community repository there's no longer any reason to keep this package. It only did repackage the official binaries and community/electron does an even better job of providing them. All AUR dependencies on this package have already switched to electron.

[1] https://aur.archlinux.org/account/MoroS/ [2] https://aur.archlinux.org/pkgbase/electron-bin/