events: remove redundant todo

[gurgunday]

As said by the person who put the todo in the first place, it has been redundant for a while now

We have kWeakHandler: this now

PR removes it to prevent confusion

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 88.51%. Comparing base (637bda0) to head (932b31c).
⚠️ Report is 4 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main   #60595   +/-   ##
=======================================
  Coverage   88.51%   88.51%           
=======================================
  Files         704      704           
  Lines      208883   208881    -2     
  Branches    40334    40322   -12     
=======================================
+ Hits       184890   184891    +1     
+ Misses      15977    15973    -4     
- Partials     8016     8017    +1     

Files with missing lines	Coverage Δ
lib/internal/event_target.js	99.16% <ø> (-0.01%)	⬇️

... and 32 files with indirect coverage changes

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[nodejs-github-bot]

CI: https://ci.nodejs.org/job/node-test-pull-request/70881/

[nodejs-github-bot]

Landed in 5f7c3a6