Remove *_version properties of ServiceWorkerRegistration and workerRegistrationDeleted event.

Source/devtools/front_end/sdk/ServiceWorkerManager.js

Index: Source/devtools/front_end/sdk/ServiceWorkerManager.js
diff --git a/Source/devtools/front_end/sdk/ServiceWorkerManager.js b/Source/devtools/front_end/sdk/ServiceWorkerManager.js
index 31bcfa0d95ffb0737226e490adcee47220364f2d..4bc677bb6d58678fe6c1485185996e192fc6c2d6 100644
--- a/Source/devtools/front_end/sdk/ServiceWorkerManager.js
+++ b/Source/devtools/front_end/sdk/ServiceWorkerManager.js
@@ -237,7 +237,7 @@ WebInspector.ServiceWorkerDispatcher.prototype = {
      */
     workerRegistrationUpdated: function(registrations)
     {
-        //FIXME: implement this.
+        // FIXME: implement this.
     },
 
     /**
@@ -246,16 +246,7 @@ WebInspector.ServiceWorkerDispatcher.prototype = {
      */
     workerVersionUpdated: function(versions)
     {
-        //FIXME: implement this.
-    },
-
-    /**
-     * @override
-     * @param {string} registrationId
-     */
-    workerRegistrationDeleted: function(registrationId)
-    {
-        //FIXME: implement this.
+        // FIXME: implement this.
     }
 }