refactor: Remove playOnLoad from setContentWith(AdTag|AdsResponse|ads…

…Request). This stopped working with the refactor, and due to how the player and contrib-ads handle autoplay, is no longer supported. Fixes #524.

src/controller.js

@@ -570,25 +570,6 @@ Controller.prototype.setContentWithAdsRequest =
   this.playerWrapper.changeSource(contentSrc);
 };
 
-/**
- * Sets the content of the video player. You should use this method instead
- * of setting the content src directly to ensure the proper ads request is
- * used when the video content is loaded.
- * @param {?string} contentSrc The URI for the content to be played. Leave
- *     blank to use the existing content.
- * @param {?Object} adsRequest The ads request to be requested when the
- *     content loads. Leave blank to use the existing ads request.
- * @param {?boolean} playOnLoad True to play the content once it has loaded,
- *     false to only load the content but not start playback.
- */
-Controller.prototype.setContentWithAdsRequest =
-    function(contentSrc, adsRequest, playOnLoad) {
-  this.reset();
-  this.settings.adsRequest =
-      adsRequest ? adsRequest : this.settings.adsRequest;
-  this.playerWrapper.changeSource(contentSrc, playOnLoad);
-};
-
 
 /**
  * Resets the state of the plugin.