remove the same function withoutDuplicates() in Array Extension

[fallwd]

Checklist

• [x ] I checked the Contributing Guidelines before creating this request.
• [ x] New extensions are written in Swift 5.6.
• [x ] New extensions support iOS 12.0+ / tvOS 12.0+ / macOS 10.13+ / watchOS 4.0+, or use @available if not.
• I have added tests for new extensions, and they passed.
• [x ] All extensions have a clear comments explaining their functionality, all parameters and return type in English.
• [x ] All extensions are declared as public.
• [x ] I have added a changelog entry describing my changes.

[guykogus]

@fallwd where do you see this duplicated? You're just removing functionality here...

[fallwd]

@fallwd where do you see this duplicated? You're just removing functionality here...

sorry, I'll close.

[SwifterSwiftBot]

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 68.17%. Comparing base (c4571a9) to head (3217dd5).
Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1224      +/-   ##
==========================================
- Coverage   68.22%   68.17%   -0.05%     
==========================================
  Files          98       98              
  Lines        3647     3642       -5     
==========================================
- Hits         2488     2483       -5     
  Misses       1159     1159              

Flag	Coverage Δ
macos	97.06% <ø> (-0.01%)	⬇️
tvos	58.98% <ø> (-0.06%)	⬇️

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