Pkg linting issues

[teivah]

Fixing several small linting issues in /pkg:

• Public comments
• Inconsistent slice declaration
• Useless parenthesis
• Useless type conversion

Checklist

• When introducing a new scaler, I agree with the scaling governance policy
• I have verified that my change is according to the deprecations & breaking changes policy
• Tests have been added
• Changelog has been updated and is aligned with our changelog requirements
• A PR is opened to update our Helm chart (repo) (if applicable, ie. when deployment manifests are modified)
• A PR is opened to update the documentation on (repo) (if applicable)
• Commits are signed with Developer Certificate of Origin (DCO - learn more)

Fixes #

Relates to #

[github-actions]

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[zroubalik]

/run-e2e internal
Update: You can check the progress here

[zroubalik]

LGTM, thanks for the fix!