refactor(core): removed unnecessary class variable

src/core/VideoPlayer.ts

@@ -11,7 +11,6 @@ import { BaseUI } from '../ui';
 
 export class VP {
   private video: HTMLVideoElement;
-  private videoSrc?: NodeListOf<HTMLSourceElement>;
   private config?: PlayerConfig;
   private adapter: AdapterAPI;
   private ui?: BaseUI;
@@ -22,9 +21,7 @@ export class VP {
    */
   constructor(video: string | HTMLVideoElement, config: PlayerConfig) {
     this.config = config;
-
     this.video = this.videoElement(video);
-    this.videoSrc = this.video?.querySelectorAll<HTMLSourceElement>('source');
 
     if (!this.config.type) {
       throw new Error('Type not specified in config.');