Remove void from TS

examples/jsm/objects/LightningStorm.d.ts

@@ -31,5 +31,5 @@ export class LightningStorm {
   constructor(stormParams?: StormParams);
   update(time: number): void;
   copy(source: LightningStorm): LightningStorm;
-  clone(void): LightningStorm;
+  clone(): LightningStorm;
 }