Remove unused modifiable param

[BurningCN]

What is the purpose of the change

Remove unused modifiable param

[codecov-commenter]

Codecov Report

Merging #8411 (1eb5434) into 3.0 (e2d1ec0) will decrease coverage by 0.53%.
The diff coverage is 100.00%.

@@             Coverage Diff              @@
##                3.0    #8411      +/-   ##
============================================
- Coverage     63.58%   63.05%   -0.54%     
+ Complexity      313      311       -2     
============================================
  Files          1074     1099      +25     
  Lines         45211    46022     +811     
  Branches       6807     6925     +118     
============================================
+ Hits          28749    29018     +269     
- Misses        13272    13741     +469     
- Partials       3190     3263      +73     

Impacted Files	Coverage Δ
...mon/src/main/java/org/apache/dubbo/common/URL.java	39.19% <100.00%> (+0.18%)	⬆️
...ain/java/org/apache/dubbo/common/URLStrParser.java	85.27% <100.00%> (-0.23%)	⬇️
...figcenter/file/FileSystemDynamicConfiguration.java	0.00% <0.00%> (-59.53%)	⬇️
...nfigcenter/nop/NopDynamicConfigurationFactory.java	50.00% <0.00%> (-50.00%)	⬇️
...nfig/configcenter/nop/NopDynamicConfiguration.java	25.00% <0.00%> (-37.50%)	⬇️
...ng/transport/dispatcher/all/AllChannelHandler.java	62.06% <0.00%> (-34.49%)	⬇️
...o/registry/zookeeper/ZookeeperRegistryFactory.java	66.66% <0.00%> (-33.34%)	⬇️
...tore/zookeeper/ZookeeperMetadataReportFactory.java	66.66% <0.00%> (-33.34%)	⬇️
...ookeeper/ZookeeperDynamicConfigurationFactory.java	66.66% <0.00%> (-33.34%)	⬇️
...fig/configcenter/TreePathDynamicConfiguration.java	60.00% <0.00%> (-25.72%)	⬇️
... and 188 more

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