fix(module:list): unintended output from SetGutterStyle

[superjerry88]

Removed an unintended console writeline that is causing flooded output

🤔 This is a ...

• New feature
• Bug fix
• Site / documentation update
• Demo update
• Component style update
• Bundle size optimization
• Performance optimization
• Refactoring
• Code style optimization
• Test Case
• Branch merge
• Other (about what?)

🔗 Related issue link

#1154

💡 Background and solution

📝 Changelog

Language	Changelog
🇺🇸 English	Removed unintended console output from SetGutterStyle
🇨🇳 Chinese

☑️ Self Check before Merge

⚠️ Please check all items below before review. ⚠️

• Doc is updated/provided or not needed
• Demo is updated/provided or not needed
• Changelog is provided or not needed

[codecov-io]

Codecov Report

Merging #1159 (21f24f3) into master (df2cabd) will increase coverage by 0.00%.
The diff coverage is n/a.

@@          Coverage Diff           @@
##           master   #1159   +/-   ##
======================================
  Coverage    6.54%   6.54%           
======================================
  Files         436     436           
  Lines       24431   24430    -1     
======================================
  Hits         1600    1600           
+ Misses      22831   22830    -1     

Impacted Files	Coverage Δ
components/list/ListItem.razor.cs	0.00% <ø> (ø)

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