fix(scripts): remove min.css

[danranVm]

PR Checklist

Please check if your PR fulfills the following requirements:

• The commit message follows our guidelines
• Tests for the changes have been added/updated or not needed
• Docs and demo have been added/updated or not needed

What is the current behavior?

• less-plugin-clean-css 压缩后会导致部分组件的样式优先级问题

What is the new behavior?

• 由于目前的打包工具都自带了压缩工具，所以组件库不再单独提供 min.css

Other information

[idux-bot]

This preview will be available after the AzureCI is passed.

[codecov]

Codecov Report

Merging #1359 (5ec342a) into main (49c8743) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main    #1359   +/-   ##
=======================================
  Coverage   93.05%   93.05%           
=======================================
  Files         325      325           
  Lines       30021    30021           
  Branches     2478     2478           
=======================================
  Hits        27936    27936           
  Misses       2085     2085           

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