Do not warn about the number of subscribers to renderer store state change events

[petemill]

Fix #9643

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.
• Request a security/privacy review as needed. (Ask a Brave employee to help if you cannot access this document.)

Test Plan:

Reviewer Checklist:

• Request a security/privacy review as needed if one was not already requested.

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

[codecov-io]

Codecov Report

Merging #12909 into master will decrease coverage by 0.02%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master   #12909      +/-   ##
==========================================
- Coverage   56.13%    56.1%   -0.03%     
==========================================
  Files         279      279              
  Lines       27322    27328       +6     
  Branches     4444     4444              
==========================================
- Hits        15336    15333       -3     
- Misses      11986    11995       +9

Flag	Coverage Δ
#unittest	56.1% <100%> (-0.03%)	⬇️

Impacted Files	Coverage Δ
js/stores/windowStore.js	27.69% <100%> (+0.13%)	⬆️
js/stores/appStoreRenderer.js	91.66% <100%> (-8.34%)	⬇️
app/renderer/components/reduxComponent.js	84.61% <0%> (-6.16%)	⬇️

[cezaraugusto]

👌 I wouldn't change a thing®