refactor(WebSocketShard): error event handling

[didinele]

Please describe the changes this PR makes and why it should be merged:
Fixes #10397

Internal ref: https://discord.com/channels/222078108977594368/999796393810067607/1271166923500945419

[vercel]

The latest updates on your projects. Learn more about Vercel for Git ↗︎

2 Skipped Deployments

Name	Status	Preview	Comments	Updated (UTC)
discord-js	⬜️ Ignored (Inspect)	Visit Preview		Aug 15, 2024 4:07pm
discord-js-guide	⬜️ Ignored (Inspect)	Visit Preview		Aug 15, 2024 4:07pm

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 50.80%. Comparing base (432e9b8) to head (be331e3).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #10436      +/-   ##
==========================================
+ Coverage   50.79%   50.80%   +0.01%     
==========================================
  Files         228      228              
  Lines       20689    20679      -10     
  Branches     1258     1258              
==========================================
- Hits        10508    10505       -3     
+ Misses      10137    10130       -7     
  Partials       44       44              

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[SpaceEEC]

discord.js/packages/ws/src/ws/WebSocketShard.ts

Line 337 in 75f0a50

this.connection.onmessage = null;

and the like probably won't remove those listeners then anymore

resolved

no longer relevant