Bump up Deployment version and delete useless file (#7320)

docs/tutorials/stateless-application/deployment-scale.yaml

@@ -1,16 +0,0 @@
-apiVersion: apps/v1beta1
-kind: Deployment
-metadata:
-  name: nginx-deployment
-spec:
-  replicas: 4 # Update the replicas from 2 to 4
-  template:
-    metadata:
-      labels:
-        app: nginx
-    spec:
-      containers:
-      - name: nginx
-        image: nginx:1.8
-        ports:
-        - containerPort: 80

docs/tutorials/stateless-application/deployment-update.yaml

@@ -1,16 +0,0 @@
-apiVersion: apps/v1beta1
-kind: Deployment
-metadata:
-  name: nginx-deployment
-spec:
-  replicas: 2
-  template:
-    metadata:
-      labels:
-        app: nginx
-    spec:
-      containers:
-      - name: nginx
-        image: nginx:1.8 # Update the version of nginx from 1.7.9 to 1.8
-        ports:
-        - containerPort: 80

docs/tutorials/stateless-application/deployment.yaml

@@ -1,8 +1,11 @@
-apiVersion: apps/v1beta1
+apiVersion: apps/v1
 kind: Deployment
 metadata:
   name: nginx-deployment
 spec:
+  selector:
+    matchLabels:
+      app: nginx
   replicas: 2 # tells deployment to run 2 pods matching the template
   template: # create pods using pod definition in this template
     metadata: