disttask: remove revert subtask

[D3Hunter]

What problem does this PR solve?

Issue Number: close #50549

Problem Summary:

What changed and how does it work?

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 @D3Hunter. Thanks for your PR.

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[codecov]

Codecov Report

Merging #50550 (770bb5e) into master (8bb4d2f) will decrease coverage by 14.1758%.
Report is 6 commits behind head on master.
The diff coverage is 65.2173%.

Additional details and impacted files

@@                Coverage Diff                @@
##             master     #50550         +/-   ##
=================================================
- Coverage   70.2648%   56.0891%   -14.1758%     
=================================================
  Files          1454       1566        +112     
  Lines        420570     592790     +172220     
=================================================
+ Hits         295513     332491      +36978     
- Misses       104729     237364     +132635     
- Partials      20328      22935       +2607     

Flag	Coverage Δ
integration	36.6480% <50.0000%> (?)
tiprow_ft	?
unit	70.8350% <65.2173%> (+0.5728%)	⬆️

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

Components	Coverage Δ
dumpling	54.0269% <ø> (ø)
parser	∅ <ø> (∅)
br	57.0254% <ø> (+6.5250%)	⬆️

[ywqzzy]

This function is useless now

[D3Hunter]

a wrapper to create pending subtask

[okJiang]

rest lgtm

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: okJiang, ywqzzy

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Needs approval from an approver in each of these files:

• OWNERS [okJiang,ywqzzy]
• pkg/ddl/OWNERS [ywqzzy]
• pkg/disttask/OWNERS [ywqzzy]

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[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2024-01-22 02:52:20.486759976 +0000 UTC m=+756382.051057675: ☑️ agreed by ywqzzy.
• 2024-01-22 09:52:45.41381449 +0000 UTC m=+781606.978112194: ☑️ agreed by okJiang.