Remove unused meta properties for UserDashboard manifest interface

https://umbraco.slack.com/archives/C04RZVARL81/p1678191653191159

src/Umbraco.Web.UI.Client/libs/extensions-registry/user-dashboard.models.ts

@@ -5,10 +5,5 @@ import type { ManifestElement } from './models';
  */
 export interface ManifestUserDashboard extends ManifestElement {
 	type: 'userDashboard';
-	meta: MetaUserDashboard;
 }
 
-export interface MetaUserDashboard {
-	label: string;
-	pathname: string;
-}

src/Umbraco.Web.UI.Client/src/backoffice/users/current-user/manifests.ts

@@ -7,10 +7,6 @@ export const userDashboards: Array<ManifestUserDashboard> = [
 		name: 'Themes User Dashboard',
 		loader: () => import('./user-dashboard-themes.element'),
 		weight: 1,
-		meta: {
-			label: 'Themes User Dashboard',
-			pathname: 'themes',
-		},
 	},
 ];