Fine-tuning the @typescript-eslint/no-unused-vars rule

We now allow parameters to be unused. This is quite common in inherited methods.
This allows removing a bunch of: //eslint-disable-next-line @typescript-eslint/no-unused-vars
Also, "err" variables in catch MUST now be used and the special _exhaustiveCheck variable used in ":never" assigns can be unused.

front/src/Phaser/Login/EnableCameraScene.ts

@@ -24,7 +24,6 @@ export class EnableCameraScene extends ResizableScene {
 
     public onResize(): void {}
 
-    // eslint-disable-next-line @typescript-eslint/no-unused-vars
     update(time: number, delta: number): void {}
 
     public login(): void {