chore: deprecate the namespace option in blueprints and extensions

Signed-off-by: blam <ben@blam.sh>

plugins/app/src/extensions/App.tsx

@@ -27,7 +27,6 @@ import { ApiProvider } from '../../../../packages/core-app-api/src';
 import { AppThemeProvider } from '../../../../packages/core-app-api/src/app/AppThemeProvider';
 
 export const App = createExtension({
-  namespace: 'app',
   attachTo: { id: 'root', input: 'app' },
   inputs: {
     root: createExtensionInput([coreExtensionData.reactElement], {

plugins/app/src/extensions/AppLayout.tsx

@@ -23,7 +23,6 @@ import {
 import { SidebarPage } from '@backstage/core-components';
 
 export const AppLayout = createExtension({
-  namespace: 'app',
   name: 'layout',
   attachTo: { id: 'app/root', input: 'children' },
   inputs: {

plugins/app/src/extensions/AppNav.tsx

@@ -82,7 +82,6 @@ const SidebarNavItem = (
 };
 
 export const AppNav = createExtension({
-  namespace: 'app',
   name: 'nav',
   attachTo: { id: 'app/layout', input: 'nav' },
   inputs: {

plugins/app/src/extensions/AppRoot.tsx

@@ -53,7 +53,6 @@ import { RouteTracker } from '../../../../packages/frontend-app-api/src/routing/
 import { getBasePath } from '../../../../packages/frontend-app-api/src/routing/getBasePath';
 
 export const AppRoot = createExtension({
-  namespace: 'app',
   name: 'root',
   attachTo: { id: 'app', input: 'root' },
   inputs: {

plugins/app/src/extensions/AppRoutes.tsx

@@ -25,7 +25,6 @@ import {
 import { useRoutes } from 'react-router-dom';
 
 export const AppRoutes = createExtension({
-  namespace: 'app',
   name: 'routes',
   attachTo: { id: 'app/layout', input: 'content' },
   inputs: {

plugins/app/src/extensions/elements.tsx

@@ -19,7 +19,6 @@ import { AppRootElementBlueprint } from '@backstage/frontend-plugin-api';
 import React from 'react';
 
 export const oauthRequestDialogAppRootElement = AppRootElementBlueprint.make({
-  namespace: 'app',
   name: 'oauth-request-dialog',
   params: {
     element: <OAuthRequestDialog />,
@@ -28,7 +27,6 @@ export const oauthRequestDialogAppRootElement = AppRootElementBlueprint.make({
 
 export const alertDisplayAppRootElement =
   AppRootElementBlueprint.makeWithOverrides({
-    namespace: 'app',
     name: 'alert-display',
     config: {
       schema: {