remove deprecated routePath before GA

Signed-off-by: Sebastian Malton <sebastian@malton.name>

extensions/example-extension/package.json

@@ -1,5 +1,5 @@
 {
-  "name": "extension-example",
+  "name": "example-extension",
   "version": "1.0.0",
   "description": "Example extension",
   "main": "dist/main.js",

extensions/example-extension/renderer.tsx

@@ -6,7 +6,6 @@ export default class ExampleExtension extends LensRendererExtension {
   clusterPages = [
     {
       id: "example",
-      routePath: "/extension-example",
       title: "Example Extension",
       components: {
         Page: () => <ExamplePage extension={this}/>,