[cleanup][broker] Remove legacy code

[aloyszhang]

Motivation

remove legacy code

Modifications

remove legacy code

Verifying this change

• Make sure that the change passes the CI checks.

(Please pick either of the following options)

This change is a trivial rework / code cleanup without any test coverage.

Documentation

• doc-not-needed

[github-actions]

@aloyszhang Please add the following content to your PR description and select a checkbox:

- [ ] `doc` <!-- Your PR contains doc changes -->
- [ ] `doc-required` <!-- Your PR changes impact docs and you will update later -->
- [ ] `doc-not-needed` <!-- Your PR changes do not impact docs -->
- [ ] `doc-complete` <!-- Docs have been already added -->

[codelipenghui]

/pulsarbot run-failure-checks

[codecov-commenter]

Codecov Report

Merging #18330 (62f4a6a) into master (8b404d4) will decrease coverage by 2.01%.
The diff coverage is 6.12%.

@@             Coverage Diff              @@
##             master   #18330      +/-   ##
============================================
- Coverage     47.15%   45.13%   -2.02%     
- Complexity    10432    10630     +198     
============================================
  Files           697      758      +61     
  Lines         68023    72738    +4715     
  Branches       7284     7804     +520     
============================================
+ Hits          32074    32831     +757     
- Misses        32367    36213    +3846     
- Partials       3582     3694     +112     

Flag	Coverage Δ
unittests	45.13% <6.12%> (-2.02%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
...rg/apache/pulsar/broker/service/AbstractTopic.java	65.45% <ø> (+0.58%)	⬆️
...he/pulsar/client/impl/MultiTopicsConsumerImpl.java	22.98% <0.00%> (+0.71%)	⬆️
...n/java/org/apache/pulsar/client/util/NoOpLock.java	0.00% <0.00%> (ø)
...va/org/apache/pulsar/client/impl/ConsumerImpl.java	15.12% <7.69%> (+0.28%)	⬆️
...va/org/apache/pulsar/client/impl/ConsumerBase.java	21.93% <16.66%> (-0.02%)	⬇️
.../transaction/buffer/metadata/AbortTxnMetadata.java	28.57% <0.00%> (-57.15%)	⬇️
...ion/buffer/metadata/TransactionBufferSnapshot.java	42.85% <0.00%> (-42.86%)	⬇️
...saction/timeout/TransactionTimeoutTrackerImpl.java	50.87% <0.00%> (-36.85%)	⬇️
...oker/loadbalance/LoadResourceQuotaUpdaterTask.java	44.44% <0.00%> (-33.34%)	⬇️
...er/impl/SingleSnapshotAbortedTxnProcessorImpl.java	51.19% <0.00%> (-29.77%)	⬇️
... and 117 more