fix(module:carousel): delete unnecessary logic (#6942)

[Gornachok]

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)
• 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: #6942

What is the new behavior?

Carousel dots and slick-active class works fine now in RTL

Does this PR introduce a breaking change?

• Yes
• No

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 91.55%. Comparing base (175f47b) to head (f67c2ed).
Report is 83 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #8705      +/-   ##
==========================================
+ Coverage   91.53%   91.55%   +0.02%     
==========================================
  Files         538      538              
  Lines       18441    18435       -6     
  Branches     2816     2814       -2     
==========================================
- Hits        16880    16879       -1     
+ Misses       1242     1239       -3     
+ Partials      319      317       -2     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[HyperLife1119]

LGTM