chore(enableLayerSuspension) remove all enableLayerSuspension references

modules/qualitycontrol/SendVideoController.spec.js

      */
     constructor() {
         super();
-        this.options = {
-            config: { enableLayerSuspension: true }
-        };
+        this.options = {};
         this.activeMediaSession = undefined;
         this.mediaSessions = [];
     }

modules/xmpp/JingleSessionPC.js

  * @property {boolean} disableSimulcast - Described in the config.js[1].
  * @property {boolean} enableInsertableStreams - Set to true when the insertable streams constraints is to be enabled
  * on the PeerConnection.
- * @property {boolean} enableLayerSuspension - Described in the config.js[1].
  * @property {boolean} failICE - it's an option used in the tests. Set to
  * <tt>true</tt> to block any real candidates and make the ICE fail.
  * @property {boolean} gatherStats - Described in the config.js[1].

types/auto/modules/xmpp/JingleSessionPC.d.ts

  * @property {boolean} disableSimulcast - Described in the config.js[1].
  * @property {boolean} enableInsertableStreams - Set to true when the insertable streams constraints is to be enabled
  * on the PeerConnection.
- * @property {boolean} enableLayerSuspension - Described in the config.js[1].
  * @property {boolean} failICE - it's an option used in the tests. Set to
  * <tt>true</tt> to block any real candidates and make the ICE fail.
  * @property {boolean} gatherStats - Described in the config.js[1].
      * on the PeerConnection.
      */
     enableInsertableStreams: boolean;
-    /**
-     * - Described in the config.js[1].
-     */
-    enableLayerSuspension: boolean;
     /**
      * - it's an option used in the tests. Set to
      * <tt>true</tt> to block any real candidates and make the ICE fail.