[ISSUE #5699] remove duplicate code definition of UtilAll.isBlank

[xiaoyifang]

Make sure set the target branch to develop

What is the purpose of the change

fix #5699

Brief changelog

XX

Verifying this change

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[codecov-commenter]

Codecov Report

Merging #5700 (bca7de3) into develop (aa7a442) will increase coverage by 0.18%.
The diff coverage is 50.00%.

❗ Current head bca7de3 differs from pull request most recent head 959bdf3. Consider uploading reports for the commit 959bdf3 to get more accurate results

@@              Coverage Diff              @@
##             develop    #5700      +/-   ##
=============================================
+ Coverage      42.35%   42.53%   +0.18%     
- Complexity      8192     8210      +18     
=============================================
  Files           1060     1060              
  Lines          73108    73091      -17     
  Branches        9586     9580       -6     
=============================================
+ Hits           30962    31092     +130     
+ Misses         38234    38083     -151     
- Partials        3912     3916       +4     

Impacted Files	Coverage Δ
...he/rocketmq/remoting/protocol/RemotingCommand.java	70.83% <0.00%> (+1.10%)	⬆️
...cketmq/remoting/protocol/RocketMQSerializable.java	84.34% <ø> (-0.78%)	⬇️
.../main/java/org/apache/rocketmq/common/UtilAll.java	36.52% <100.00%> (-0.55%)	⬇️
...tmq/remoting/protocol/body/ConsumerConnection.java	95.83% <0.00%> (-4.17%)	⬇️
...controller/impl/DefaultBrokerHeartbeatManager.java	74.41% <0.00%> (-3.49%)	⬇️
...che/rocketmq/container/BrokerContainerStartup.java	53.94% <0.00%> (-2.20%)	⬇️
...ache/rocketmq/proxy/common/ReceiptHandleGroup.java	65.30% <0.00%> (-2.05%)	⬇️
...ava/org/apache/rocketmq/filter/util/BitsArray.java	58.11% <0.00%> (-1.71%)	⬇️
...mq/client/impl/consumer/RebalanceLitePullImpl.java	69.86% <0.00%> (-1.37%)	⬇️
...apache/rocketmq/store/ha/GroupTransferService.java	92.30% <0.00%> (-1.29%)	⬇️
... and 29 more

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[mxsm]

LGTM~