lightning: remove legacy code of session

[lcwangchao]

What problem does this PR solve?

Issue Number: ref #53388

What changed and how does it work?

After #56038, some codes are useless now. This PR just removes them.

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

[tiprow]

Hi @lcwangchao. Thanks for your PR.

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 57.1120%. Comparing base (66d8cdc) to head (7de47ae).
Report is 13 commits behind head on master.

Additional details and impacted files

@@                Coverage Diff                @@
##             master     #56174         +/-   ##
=================================================
- Coverage   72.9612%   57.1120%   -15.8493%     
=================================================
  Files          1611       1761        +150     
  Lines        447632     639790     +192158     
=================================================
+ Hits         326598     365397      +38799     
- Misses       101001     250292     +149291     
- Partials      20033      24101       +4068     

Flag	Coverage Δ
integration	39.5414% <ø> (?)
unit	73.0754% <ø> (+1.0351%)	⬆️

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

Components	Coverage Δ
dumpling	52.9567% <ø> (ø)
parser	∅ <ø> (∅)
br	52.9963% <ø> (+7.1202%)	⬆️

[lcwangchao]

/retest

[tiprow]

@lcwangchao: Cannot trigger testing until a trusted user reviews the PR and leaves an /ok-to-test message.

In response to this:

/retest

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[lance6716]

/cc @D3Hunter @hawkingrei

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: D3Hunter, lance6716

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[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2024-09-20 04:10:49.197919778 +0000 UTC m=+1193518.938343717: ☑️ agreed by lance6716.
• 2024-09-20 07:23:54.180651818 +0000 UTC m=+1205103.921075762: ☑️ agreed by D3Hunter.

[lcwangchao]

/retest

[tiprow]

@lcwangchao: Cannot trigger testing until a trusted user reviews the PR and leaves an /ok-to-test message.

In response to this:

/retest

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes-sigs/prow repository.