fixed types

src/pages/not-found/NotFoundElement.ts

@@ -1,7 +1,5 @@
 import { controller } from "@github/catalyst";
-import { closest, update } from "core/utils";
-import { html, render } from "@github/jtml";
-import { AppMainElement } from "components/";
+import { html, TemplateResult } from "@github/jtml";
 import { BasePageElement } from "common/";
 
 @controller
@@ -9,14 +7,16 @@ class NotFoundElement extends BasePageElement {
     constructor() {
         super();
     }
-    elementConnected = () => {
+    elementConnected = (): void => {
         this.update();
     };
 
-    render = () => {
+    render = (): TemplateResult => {
         return html`
             <div>404 - Page not found</div>
             <div><app-link data-to="/" data-title="Homepage"></app-link></div>
         `;
     };
 }
+
+export type { NotFoundElement };