tests/container: Drop Ignition override

These hardcoded package versions just ruin CI.  We're
unlikely to break this.

Eventually what we'll want to do is set up something like
a COPR that auto-regenerates "dummy" changes.

ci/test-container.sh

@@ -71,30 +71,7 @@ if ! grep -qFe "not yet implemented" err.txt; then
   assert_not_reached "unexpected error"
 fi
 
-# Test overrides
-versionid=$(grep -E '^VERSION_ID=' /etc/os-release)
-versionid=${versionid:11} # trim off VERSION_ID=
-case $versionid in
-  38)
-    url_suffix=2.15.0/4.fc39/x86_64/ignition-2.15.0-4.fc39.x86_64.rpm
-    # 2.15.0-3
-    koji_url="https://koji.fedoraproject.org/koji/buildinfo?buildID=2158585"
-    koji_kernel_url="https://koji.fedoraproject.org/koji/buildinfo?buildID=2174317"
-    kver=6.2.8
-    krev=300
-    ;;
-  *) fatal "Unsupported Fedora version: $versionid";;
-esac
-URL=https://kojipkgs.fedoraproject.org//packages/ignition/$url_suffix
-# test replacement by URL
-rpm-ostree override replace $URL
-rpm-ostree override remove ignition
-# test local RPM install
-curl -Lo ignition.rpm $URL
-rpm-ostree install ignition.rpm
-rpm -q ignition
-
-# And verify it's uninstalled
+# Verify dnf wrapper
 dnf -y uninstall kexec-tools
 if rpm -q kexec-tools; then fatal "failed to remove kexec-tools"; fi