chore: fix sonar and lint issues

[krishna2020]

Description of the change

PR #2540 introduced lint & sonar issues on src/middleware.js, this PR is to fix those

Type of change

• Bug fix (non-breaking change that fixes an issue)
• New feature (non-breaking change that adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

Related issues

Fix #1

Checklists

Development

• Lint rules pass locally
• The code changed/added as part of this pull request has been covered with tests
• All tests related to the changed code pass in development

Code review

• This pull request has a descriptive title and information useful to a reviewer. There may be a screenshot or screencast attached
• "Ready for review" label attached to the PR and reviewers mentioned in a comment
• Changes have been reviewed by at least one other engineer
• Issue from task tracker has a link to this pull request

[codecov]

Codecov Report

Patch coverage: 98.27% and project coverage change: +0.01% 🎉

Comparison is base (23bb1f6) 86.94% compared to head (0e8e95d) 86.95%.
Report is 4 commits behind head on develop.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #2607      +/-   ##
===========================================
+ Coverage    86.94%   86.95%   +0.01%     
===========================================
  Files          600      602       +2     
  Lines        28054    28091      +37     
  Branches      6681     6686       +5     
===========================================
+ Hits         24391    24427      +36     
- Misses        3329     3330       +1     
  Partials       334      334              

Files Changed	Coverage Δ
src/v0/destinations/twitter_ads/transform.js	93.33% <96.00%> (-0.86%)	⬇️
...dk/v2/destinations/launchdarkly_audience/config.js	100.00% <100.00%> (ø)
...cdk/v2/destinations/launchdarkly_audience/utils.js	100.00% <100.00%> (ø)

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[sonarqubecloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

71.8% Coverage
0.0% Duplication