Fix(Structure): ReactionUserStore#remove() cause event messageReactionRemove to fires twice

[KhooHaoYit]

This PR fixes #3268.
Please describe the changes this PR makes and why it should be merged:
Same problem as #3252.

ReactionUserStore#remove() execute messageReactionRemove action handler.
After that, it got executed again by the WebSocketManager.

Status

• Code changes have been tested against the Discord API, or there are no code changes
• I know how to update typings and have done so, or typings don't need updating

Semantic versioning classification:

• This PR changes the library's interface (methods or parameters added)
  • This PR includes breaking changes (methods removed or renamed, parameters moved or removed)
• This PR only includes non-code changes, like changes to documentation, README, etc.

[bsantosh909]

I dont know about the internals, but yeah that fixes the Issue.

Just tested out the branch of PR with the same code and got the proper result as expected in #3268