fix: hex layer now only updates once when changed

[Rizq0]

No description provided.

[Rizq0]

Ignore the prettier formatting, but seemed to have fixed the layer duplication.

I believe there was a form of duplication happening when the hex layer changed. When the shard changed, the event listening was calling initialiseLayers (this.updateHexSectorsLayer(shard);), but the hex sector layers was also managed by hexSectorsEffect. They were both reacting to the same change sometimes causing duplicates to appear.

I removed this.updateHexSectorsLayer(shard); from initaliseLayers and in turn the updateHexSectorsLayer method. Instead, hexSectorsEffect is listening for a shard change and handleHexSectorsVisibility now removes the layer first to then get the updated layer when an event happens.