Packit: do not notify on podman-next failures

podman-next failure notifications are mostly if not totally ignored so
there's no point keeping them.

While these notifications ideally shouldn't be ignored, some builds on
podman-next frequently fail because of older toolchain and end up
causing a lot of noise.

Signed-off-by: Lokesh Mandvekar <[email protected]>

Author: lsm5

.packit.yaml

@@ -92,9 +92,6 @@ jobs:
   - job: copr_build
     trigger: commit
     packages: [podman-fedora]
-    notifications:
-      failure_comment:
-        message: "podman-next COPR build failed. @containers/packit-build please check."
     branch: main
     owner: rhcontainerbot
     project: podman-next