statistics: remove dead code

[Rustin170506]

Signed-off-by: Rustin170506 [email protected]

What problem does this PR solve?

Issue Number: ref #57804

Problem Summary:

What changed and how does it work?

In this PR, I removed the dead code. The stats loading for the PK, as shown, has never been executed, so it is safe to remove.

Some background:

1. statistics: fix PK column TopN not loading when init stats #37552 This PR tried to load it correctly.
2. statistics: fix wrong behavior for primary key' non-lite init stats #53298 This PR decided to remove it at all.
3. Another fix based on the previous PR: *: not load unnecessay data during the non-lite-init-stats #53399
4. Another full rewrite: statistics: correct behavior of non-lite InitStats and stats sync load of no stats column #57803

So we just forgot to delete it.

Check List

Tests

• Unit test
• Integration test
• Manual test (add detailed scripts or steps below)
• No need to test

  • I checked and no code files have been changed.

Side effects

• Performance regression: Consumes more CPU
• Performance regression: Consumes more Memory
• Breaking backward compatibility

Documentation

• Affects user behaviors
• Contains syntax changes
• Contains variable changes
• Contains experimental features
• Changes MySQL compatibility

Release note

Please refer to Release Notes Language Style Guide to write a quality release note.

None

[Rustin170506]

🔢 Self-check (PR reviewed by myself and ready for feedback.)

[codecov]

Codecov Report

Attention: Patch coverage is 88.88889% with 2 lines in your changes missing coverage. Please review.

Project coverage is 73.8575%. Comparing base (05a35ca) to head (cca5abc).
Report is 7 commits behind head on master.

Additional details and impacted files

@@               Coverage Diff                @@
##             master     #58412        +/-   ##
================================================
+ Coverage   73.5204%   73.8575%   +0.3370%     
================================================
  Files          1681       1711        +30     
  Lines        463800     472809      +9009     
================================================
+ Hits         340988     349205      +8217     
- Misses       101988     102137       +149     
- Partials      20824      21467       +643     

Flag	Coverage Δ
integration	45.9932% <11.1111%> (?)
unit	72.4153% <88.8888%> (+0.1323%)	⬆️

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

Components	Coverage Δ
dumpling	52.6910% <ø> (ø)
parser	∅ <ø> (∅)
br	45.7773% <ø> (+0.0059%)	⬆️

[Rustin170506]

/retest

[Rustin170506]

/retest

[Rustin170506]

🔢 Self-check (PR reviewed by myself and ready for feedback.)

[Rustin170506]

🔢 Self-check (PR reviewed by myself and ready for feedback.)

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: AilinKid, winoros

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• pkg/statistics/OWNERS [AilinKid,winoros]

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[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2024-12-19 09:02:07.847755663 +0000 UTC m=+1120317.936558206: ☑️ agreed by AilinKid.
• 2024-12-20 08:05:47.90070758 +0000 UTC m=+1203337.989510169: ☑️ agreed by winoros.

[Rustin170506]

/retest

[Rustin170506]

/retest

[ti-chi-bot]

In response to a cherrypick label: new pull request created to branch release-8.5: #58442.