[ISSUE #9282]remove redundant judgment

[CLFutureX]

issue

[CLAassistant]

All committers have signed the CLA.

[KomachiSion]

How about cacheMap.get() is null or configChangeBatchListenResponse is null?

[CLFutureX]

How about cacheMap.get() is null or configChangeBatchListenResponse is null?

1 As a global variable, cacheMap is initialized when it is created. So cacheMap.get() will not be empty
private final AtomicReference<Map<String, CacheData>> cacheMap = new AtomicReference<>(new HashMap<>());

[CLFutureX]

2 requestProxy()-->rpcClientInner.request

If it is null, a null exception will be thrown in advance, so it will not return null

You can also see that there is no null judgment in other places where this method is called.
for example

[codecov-commenter]

Codecov Report

Merging #9284 (7b0d55f) into develop (5396858) will not change coverage.
The diff coverage is 0.00%.

Additional details and impacted files

@@            Coverage Diff             @@
##             develop    #9284   +/-   ##
==========================================
  Coverage      44.08%   44.08%           
+ Complexity      4858     4857    -1     
==========================================
  Files            913      913           
  Lines          33047    33047           
  Branches        3825     3826    +1     
==========================================
  Hits           14569    14569           
+ Misses         17059    17055    -4     
- Partials        1419     1423    +4     

Impacted Files	Coverage Δ
...alibaba/nacos/client/config/impl/ClientWorker.java	55.16% <0.00%> (-0.20%)	⬇️
.../core/v2/event/publisher/NamingEventPublisher.java	68.75% <0.00%> (-6.25%)	⬇️
...alibaba/nacos/core/remote/control/TpsRecorder.java	74.32% <0.00%> (-1.36%)	⬇️
...baba/nacos/naming/healthcheck/HealthCheckTask.java	45.58% <0.00%> (ø)
...m/alibaba/nacos/core/remote/ConnectionManager.java	44.37% <0.00%> (+1.47%)	⬆️
...os/client/auth/ram/identify/CredentialService.java	82.69% <0.00%> (+3.84%)	⬆️

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