Fix: Removes duplicate printing of the included namespaces

[almilaneze]

What this PR does / why we need it?

• Removes duplicate printing of the non existing included namespaces (which comes from the duplicated namespaces).
• Removes unnecessary variables initialization.

PR Checklist

• This PR adds K8s exceptions (false positives)
• This PR adds new code
• This PR includes tests for new/existing code
• This PR adds docs

GitHub Issue

#378
Closes [XX-XX]

Notes for your reviewers

[codecov-commenter]

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Codecov Report

Attention: Patch coverage is 0% with 2 lines in your changes missing coverage. Please review.

Project coverage is 43.39%. Comparing base (9cd0aba) to head (ca45220).
Report is 3 commits behind head on main.

Files with missing lines	Patch %	Lines
pkg/filters/options.go	0.00%	2 Missing ⚠️

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Additional details and impacted files

@@            Coverage Diff             @@
##             main     #383      +/-   ##
==========================================
+ Coverage   43.38%   43.39%   +0.01%     
==========================================
  Files          63       63              
  Lines        4020     4019       -1     
==========================================
  Hits         1744     1744              
+ Misses       2030     2029       -1     
  Partials      246      246              

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[yonahd]

@almilaneze looks like it fixes the issue
Couple of comments

[yonahd]

LGTM!
Merged