Removing k8s contrib file (#12761)

We now have a helm chart that users should use instead

contrib/k8s/gitea.yml

@@ -1,107 +0,0 @@
-apiVersion: v1
-kind: Namespace
-metadata:
-  name: gitea
----
-apiVersion: apps/v1
-kind: Deployment
-metadata:
-  name: gitea
-  namespace: gitea
-  labels:
-    app: gitea
-spec:
-  replicas: 1
-  template:
-    metadata:
-      name: gitea
-      labels:
-        app: gitea
-    spec:
-      containers:
-      - name: gitea
-        image: gitea/gitea:latest
-        imagePullPolicy: Always
-        volumeMounts:
-          - mountPath: "/var/lib/gitea"
-            name: "root"
-          - mountPath: "/data"
-            name: "data"
-        ports:
-          - containerPort: 22
-            name: ssh
-            protocol: TCP
-          - containerPort: 3000
-            name: http
-            protocol: TCP
-      restartPolicy: Always
-      volumes:
-        # Set up a data directory for gitea
-        # For production usage, you should consider using PV/PVC instead(or simply using storage like NAS)
-        # For more details, please see https://kubernetes.io/docs/concepts/storage/volumes/
-      - name: "root"
-        hostPath:
-          # directory location on host
-          path: "/var/lib/gitea"
-          # this field is optional
-          type: Directory
-      - name: "data"
-        hostPath:
-          path: "/data/gitea"
-          type: Directory
-  selector:
-    matchLabels:
-      app: gitea
----
-# Using cluster mode
-apiVersion: v1
-kind: Service
-metadata:
-  name: gitea-web
-  namespace: gitea
-  labels:
-    app: gitea-web
-spec:
-  ports:
-  - port: 80
-    targetPort: 3000
-    name: http
-  selector:
-    app: gitea
----
-# Using node-port mode
-# This mainly open a specific TCP port for SSH usage on each host,
-# so you can use a proxy layer to handle it(e.g. slb, nginx)
-apiVersion: v1
-kind: Service
-metadata:
-  name: gitea-ssh
-  namespace: gitea
-  labels:
-    app: gitea-ssh
-spec:
-  ports:
-  - port: 22
-    targetPort: 22
-    nodePort: 30022
-    name: ssh
-  selector:
-    app: gitea
-  type: NodePort
----
-# Ingress is always suitable for HTTP usage,
-# we suggest using an proxy layer such as slb to send traffic to different ports.
-# Usually 80/443 for web and 22 directly for SSH.
-apiVersion: extensions/v1beta1
-kind: Ingress
-metadata:
-  name: gitea
-  namespace: gitea
-spec:
-  rules:
-  - host: your-gitea-host.com
-    http:
-      paths:
-      - backend:
-          serviceName: gitea-web
-          servicePort: 80