fedora: Fix eatmydata script
The /usr/bin/eatmydata script tries to call the dpkg-architecture
command, which doesn't exist on Fedora. Remove that line.
This wasn't directly causing test failures, but it may be leading to timeout errors; I'm seeing more on Fedora images than Ubuntu now. (eatmydata is working on Ubuntu).
See https://gitlab.gnome.org/GNOME/tracker-miners/pipelines/159401 for example.