refactor(module:tag): refactor

[hsuanxyz]

PR Checklist

Please check if your PR fulfills the following requirements:

• The commit message follows our guidelines: https://github.com/NG-ZORRO/ng-zorro-antd/blob/master/CONTRIBUTING.md#commit
• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)

PR Type

What kind of change does this PR introduce?

[ ] Bugfix
[ ] Feature
[ ] Code style update (formatting, local variables)
[x] Refactoring (no functional changes, no api changes)
[ ] Build related changes
[ ] CI related changes
[ ] Documentation content changes
[ ] Application (the showcase website) / infrastructure changes
[ ] Other... Please describe:

What is the current behavior?

Issue Number: N/A

What is the new behavior?

Does this PR introduce a breaking change?

[ ] Yes
[x] No

Other information

[zorro-bot]

This preview will be available after the AzureCI is passed.

[wzhudev]

LGTM

[wzhudev]

🤣

[codecov]

Codecov Report

Merging #4793 into master will decrease coverage by 0.00%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #4793      +/-   ##
==========================================
- Coverage   93.21%   93.20%   -0.01%     
==========================================
  Files         505      505              
  Lines       12742    12740       -2     
  Branches     1955     1954       -1     
==========================================
- Hits        11877    11874       -3     
  Misses        455      455              
- Partials      410      411       +1     

Impacted Files	Coverage Δ
components/time-picker/time-holder.ts	97.31% <0.00%> (-0.68%)	⬇️

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