Fix lint errors introduced with #9879

[luixxiul]

#9879

See b794367#diff-8a9bac13ef6264feb2b6da7c18d86b3cR233

Auditors:

Test Plan: npm run lint

Submitter Checklist:

• Submitted a ticket for my issue if one did not already exist.
• Used Github auto-closing keywords in the commit message.
• Added/updated tests for this change (for new code or code which already has tests).
• Ran git rebase -i to squash commits (if needed).
• Tagged reviewers and labelled the pull request as needed.

Test Plan:

Reviewer Checklist:

Tests

• Adequate test coverage exists to prevent regressions
• Tests should be independent and work correctly when run individually or as a suite ref
• New files have MPL2 license header

[darkdh]

++. Thanks

[codecov-io]

Codecov Report

Merging #10128 into master will not change coverage.
The diff coverage is 100%.

@@           Coverage Diff           @@
##           master   #10128   +/-   ##
=======================================
  Coverage    52.8%    52.8%           
=======================================
  Files         227      227           
  Lines       20197    20197           
  Branches     3234     3234           
=======================================
  Hits        10666    10666           
  Misses       9531     9531

Flag	Coverage Δ
#unittest	52.8% <100%> (ø)	⬆️

Impacted Files	Coverage Δ
app/filtering.js	18.33% <100%> (ø)	⬆️

[bsclifton]

Apologies- I didn't see this and fixed with d14fb50 ☹️