Remove Tabs from ComponentRegisterer (#713)

Now that Tabs are being rendered via Tabs.tsx the knockout component names are not needed either.

src/Explorer/Tabs/TabsBase.ts

@@ -14,7 +14,6 @@ import { TabsManager } from "./TabsManager";
 // TODO: Use specific actions for logging telemetry data
 export default class TabsBase extends WaitsForTemplateViewModel {
   private static id = 0;
-  public static readonly component = { name: "tab", template: "" };
   public closeTabButton: ViewModels.Button;
   public node: ViewModels.TreeNode;
   public collection: ViewModels.CollectionBase;