[MINOR] chore(operator): remove useless configuration items in config…

…uration example (apache#764)

### What changes were proposed in this pull request?
Remove useless configuration items in configuration example.

### Why are the changes needed?
The configuration items that removed will be generated automatically. Setting them has no effect.

### Does this PR introduce any user-facing change?
No.

### How was this patch tested?
No need

deploy/kubernetes/operator/examples/configuration.yaml

@@ -42,11 +42,13 @@ data:
     log4j.appender.RollingAppender.layout=org.apache.log4j.PatternLayout
     log4j.appender.RollingAppender.layout.ConversionPattern=[%p] %d %t %c{1} %M - %m%n
   server.conf: |-
-    rss.coordinator.quorum rss-coordinator-rss-demo-0:19997,rss-coordinator-rss-demo-1:19997
-    rss.jetty.http.port 19996
+    # these configurations in comments are generated by operator automatically
+    # rss.coordinator.quorum
+    # rss.jetty.http.port
+    # rss.rpc.server.port
+    # rss.storage.basePath
     rss.rpc.executor.size 500
     rss.rpc.message.max.size 1073741824
-    rss.rpc.server.port 19997
     rss.server.app.expired.withoutHeartbeat 120000
     rss.server.buffer.capacity 60g
     rss.server.commit.timeout 600000
@@ -70,5 +72,4 @@ data:
     rss.server.read.buffer.capacity 5g
     rss.server.shuffle.expired.timeout.ms 120000
     rss.server.write.retry.max 2
-    rss.storage.basePath /data1/rssdata,/data10/rssdata,/data11/rssdata,/data12/rssdata,/data2/rssdata,/data3/rssdata,/data4/rssdata,/data5/rssdata,/data6/rssdata,/data7/rssdata,/data8/rssdata,/data9/rssdata
     rss.storage.type MEMORY_LOCALFILE