Remove references to tag: 2.6.0 in examples (#210)

### Motivation

It's better to not maintain out-dated examples referencing the 2.6.0 tag version.

### Modifications

- remove out-dated examples

examples/values-one-node.yaml

@@ -21,14 +21,6 @@
 affinity:
   anti_affinity: false
 
-images:
-  broker:
-    repository: apachepulsar/pulsar-all
-    tag: 2.6.0
-  functions:
-    repository: apachepulsar/pulsar-all
-    tag: 2.6.0
-
 # disable auto recovery
 components:
   autorecovery: false

examples/values-pulsar.yaml

@@ -1,50 +0,0 @@
-#
-# Licensed to the Apache Software Foundation (ASF) under one
-# or more contributor license agreements.  See the NOTICE file
-# distributed with this work for additional information
-# regarding copyright ownership.  The ASF licenses this file
-# to you under the Apache License, Version 2.0 (the
-# "License"); you may not use this file except in compliance
-# with the License.  You may obtain a copy of the License at
-#
-#   http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing,
-# software distributed under the License is distributed on an
-# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
-# KIND, either express or implied.  See the License for the
-# specific language governing permissions and limitations
-# under the License.
-#
-
-images:
-  zookeeper:
-    repository: apachepulsar/pulsar-all
-    tag: 2.6.0
-  bookie:
-    repository: apachepulsar/pulsar-all
-    tag: 2.6.0
-  autorecovery:
-    repository: apachepulsar/pulsar-all
-    tag: 2.6.0
-  broker:
-    repository: apachepulsar/pulsar-all
-    tag: 2.6.0
-  functions:
-    repository: apachepulsar/pulsar-all
-    tag: 2.6.0
-  proxy:
-    repository: apachepulsar/pulsar-all
-    tag: 2.6.0
-
-bookkeeper:
-  metadata:
-    image:
-      repository: apachepulsar/pulsar-all
-      tag: 2.6.0
-
-
-pulsar_metadata:
-  image:
-    repository: apachepulsar/pulsar-all
-    tag: 2.6.0