[fix][doc] fix doc related to chunk message feature.

[thetumbled]

Motivation

Chunk message can work with shared subscription since #16202.
Related discussion refer to #24015

Modifications

Remove the incorrect doc of chunk message.

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.

Does this pull request potentially affect one of the following parts:

If the box was checked, please highlight the changes

• Dependencies (add or upgrade a dependency)
• The public API
• The schema
• The default values of configurations
• The threading model
• The binary protocol
• The REST endpoints
• The admin CLI options
• The metrics
• Anything that affects deployment

Documentation

• doc
• doc-required
• doc-not-needed
• doc-complete

Matching PR in forked repository

PR in forked repository:

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 73.92%. Comparing base (bbc6224) to head (a1aca4d).
Report is 939 commits behind head on master.

Additional details and impacted files

@@             Coverage Diff              @@
##             master   #24023      +/-   ##
============================================
+ Coverage     73.57%   73.92%   +0.35%     
+ Complexity    32624    32540      -84     
============================================
  Files          1877     1862      -15     
  Lines        139502   147451    +7949     
  Branches      15299    17173    +1874     
============================================
+ Hits         102638   109004    +6366     
- Misses        28908    29863     +955     
- Partials       7956     8584     +628     

Flag	Coverage Δ
inttests	26.84% <ø> (+2.26%)	⬆️
systests	23.11% <ø> (-1.21%)	⬇️
unittests	73.46% <ø> (+0.61%)	⬆️

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see 1059 files with indirect coverage changes