Removed comment

src/lib/services/stats.service.ts

@@ -4,7 +4,6 @@ import { HttpClient } from '@angular/common/http';
 import { tap } from 'rxjs/operators';
 import { HeadersConfiguration, mapEach, RequiredParam, Validate } from '../utils';
 
-/* WIP, not used */
 @Injectable()
 export abstract class StatsService<E, I = E> {
     private readonly _http = this._injector.get(HttpClient);