follow up for pr#4339, remove the space

[beiwei30]

What is the purpose of the change

follow up for pull request #4339

Brief changelog

XXXXX

Verifying this change

XXXXX

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[codecov-io]

Codecov Report

Merging #4591 into master will decrease coverage by 0.01%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##             master    #4591      +/-   ##
============================================
- Coverage     64.07%   64.05%   -0.02%     
- Complexity      450      453       +3     
============================================
  Files           768      768              
  Lines         32868    32865       -3     
  Branches       5179     5178       -1     
============================================
- Hits          21061    21053       -8     
- Misses         9400     9404       +4     
- Partials       2407     2408       +1

Impacted Files	Coverage Δ	Complexity Δ
...o/common/extension/AdaptiveClassCodeGenerator.java	94.95% <ø> (ø)	0 <0> (ø)	⬇️
.../apache/dubbo/qos/protocol/QosProtocolWrapper.java	64.1% <0%> (-17.95%)	0% <0%> (ø)
...apache/dubbo/common/config/ConfigurationUtils.java	64% <0%> (-8%)	0% <0%> (ø)
...bbo/registry/support/ProviderConsumerRegTable.java	80.48% <0%> (-4.88%)	0% <0%> (ø)
.../dubbo/remoting/transport/netty4/NettyChannel.java	61.17% <0%> (-4.71%)	0% <0%> (ø)
...ng/transport/dispatcher/WrappedChannelHandler.java	44.11% <0%> (-4.54%)	0% <0%> (ø)
...bo/rpc/cluster/support/FailbackClusterInvoker.java	67.21% <0%> (-3.28%)	0% <0%> (ø)
.../apache/dubbo/remoting/transport/AbstractPeer.java	63.04% <0%> (ø)	0% <0%> (ø)	⬇️
...org/apache/dubbo/registry/redis/RedisRegistry.java	48.44% <0%> (+0.28%)	32% <0%> (+1%)	⬆️
...he/dubbo/remoting/transport/netty/NettyServer.java	73.21% <0%> (+3.57%)	9% <0%> (+1%)	⬆️
... and 2 more

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[ralf0131]

LGTM.