Resolve duplicate entries for sieve of eratosthenes

[SpiderMath]

Fixes: #1666

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Describe your change:

• Add an algorithm?
• Fix a bug or typo in an existing algorithm?
• Documentation change?

Checklist:

• I have read CONTRIBUTING.md.
• This pull request is all my own work -- I have not plagiarized.
• I know that pull requests will not be merged if they fail the automated tests.
• This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms.
• All new JavaScript files are placed inside an existing directory.
• All filenames should use the UpperCamelCase (PascalCase) style. There should be no spaces in filenames.
  Example:UserProfile.js is allowed but userprofile.js,Userprofile.js,user-Profile.js,userProfile.js are not
• All new algorithms have a URL in their comments that points to Wikipedia or another similar explanation.
• If this pull request resolves one or more open issues then the commit message contains Fixes: #{$ISSUE_NO}.

Further description

I kept the SieveOfEratosthenesIntArray implementation, renaming it to SieveOfEratosthenes, removed the boolean implementation, and wrote tests for the same. Apart from that, I've also added comments to conform to the algorithm comment standards.

[SpiderMath]

I had initially worked on it but then stopped due to personal commitments, I'm back to contributing now, hence the number of commits is a bit much

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 85.09%. Comparing base (85a55da) to head (fcd636a).

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1770      +/-   ##
==========================================
- Coverage   85.11%   85.09%   -0.02%     
==========================================
  Files         378      377       -1     
  Lines       19740    19717      -23     
  Branches     2967     2963       -4     
==========================================
- Hits        16801    16778      -23     
  Misses       2939     2939              

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