Move redis config files out of old user-guide directory. (#7401)

docs/user-guide/configmap/redis/redis-config

@@ -1,2 +0,0 @@
-maxmemory 2mb
-maxmemory-policy allkeys-lru

docs/user-guide/configmap/redis/redis-pod.yaml

@@ -1,30 +0,0 @@
-apiVersion: v1
-kind: Pod
-metadata:
-  name: redis
-spec:
-  containers:
-  - name: redis
-    image: kubernetes/redis:v1
-    env:
-    - name: MASTER
-      value: "true"
-    ports:
-    - containerPort: 6379
-    resources:
-      limits:
-        cpu: "0.1"
-    volumeMounts:
-    - mountPath: /redis-master-data
-      name: data
-    - mountPath: /redis-master
-      name: config
-  volumes:
-    - name: data
-      emptyDir: {}
-    - name: config
-      configMap:
-        name: example-redis-config
-        items:
-        - key: redis-config
-          path: redis.conf