Packit: Do not notify on podman-next copr build failure

These happen after commit to upstream and don't affect upstream.

These notifications only end up adding unnecessary noise.

Overall build failures can happen for a variety of reasons like copr
infra, outdated toolchain on some environments etc.

Signed-off-by: Lokesh Mandvekar <lsm5@redhat.com>

Author: lsm5

.packit.yaml

@@ -71,9 +71,6 @@ jobs:
   - job: copr_build
     trigger: commit
     packages: [skopeo-fedora]
-    notifications:
-      failure_comment:
-        message: "podman-next COPR build failed. @containers/packit-build please check."
     branch: main
     owner: rhcontainerbot
     project: podman-next