CHORE(repo): remove self-referencing application.yaml

- Delete application.yaml (managed by platform)

application.yaml

@@ -1,33 +0,0 @@
-apiVersion: argoproj.io/v1alpha1
-kind: Application
-metadata:
-  name: observability
-  namespace: argocd
-  finalizers:
-    - resources-finalizer.argocd.argoproj.io
-spec:
-  project: default
-
-  source:
-    repoURL: https://github.com/K3S-HOME/observability.git
-    targetRevision: main
-    path: .
-
-  destination:
-    server: https://kubernetes.default.svc
-    namespace: argocd
-
-  syncPolicy:
-    automated:
-      prune: true
-      selfHeal: true
-    syncOptions:
-      - CreateNamespace=true
-    retry:
-      limit: 5
-      backoff:
-        duration: 5s
-        factor: 2
-        maxDuration: 3m
-
-  revisionHistoryLimit: 10