chore: delete flux kustomizations [skip ci]

clusters/app/flux-system/gotk-sync.yaml

@@ -1,27 +0,0 @@
-# This manifest was generated by flux. DO NOT EDIT.
----
-apiVersion: source.toolkit.fluxcd.io/v1
-kind: GitRepository
-metadata:
-  name: flux-system
-  namespace: flux-system
-spec:
-  interval: 1m0s
-  ref:
-    branch: main
-  secretRef:
-    name: flux-system
-  url: https://git.0orz.top/Zpekii/go-example.git
----
-apiVersion: kustomize.toolkit.fluxcd.io/v1
-kind: Kustomization
-metadata:
-  name: flux-system
-  namespace: flux-system
-spec:
-  interval: 10m0s
-  path: ./clusters/app
-  prune: true
-  sourceRef:
-    kind: GitRepository
-    name: flux-system