remove .stories.mdx stories and fix tests

code/frameworks/angular/template/stories/angular-mdx.stories.mdx

@@ -1,25 +0,0 @@
-import { global as globalThis } from '@storybook/global';
-import { moduleMetadata } from '@storybook/angular';
-import { Meta, Story, Canvas } from '@storybook/addon-docs';
-
-export const Button = globalThis.Components.Button;
-
-<Meta
-  title="angular/angular-mdx"
-  component={Button}
-  decorators={[moduleMetadata({ declarations: [Button] })]}
-/>
-
-# Angular-specific MDX Stories
-
-<Canvas>
-  <Story name="Angular Story">
-    {{
-      template: `<storybook-framework-button [label]="text" (onClick)="onClick($event)"></storybook-framework-button>`,
-      props: {
-        text: 'hello button',
-        onClick: () => {},
-      },
-    }}
-  </Story>
-</Canvas>

code/lib/core-server/src/utils/StoryIndexGenerator.test.ts

@@ -7,7 +7,6 @@ import { describe, beforeEach, it, expect, vi } from 'vitest';
 
 import path from 'path';
 // @ts-expect-error -- cannot find declaration file
-import { createStoriesMdxIndexer } from '@storybook/addon-docs/preset';
 import { normalizeStoriesEntry } from '@storybook/core-common';
 import type { NormalizedStoriesSpecifier, StoryIndexEntry } from '@storybook/types';
 import { readCsf, getStorySortParameter } from '@storybook/csf-tools';
@@ -45,7 +44,7 @@ const options: StoryIndexGeneratorOptions = {
   configDir: path.join(__dirname, '__mockdata__'),
   workingDir: path.join(__dirname, '__mockdata__'),
   storyIndexers: [],
-  indexers: [csfIndexer, createStoriesMdxIndexer(false)],
+  indexers: [csfIndexer],
   storyStoreV7: true,
   docs: { defaultName: 'docs', autodocs: false },
 };
@@ -292,51 +291,6 @@ describe('StoryIndexGenerator', () => {
       });
     });
 
-    describe('mdx tagged components', () => {
-      it('adds docs entry with docs enabled', async () => {
-        const specifier: NormalizedStoriesSpecifier = normalizeStoriesEntry(
-          './src/nested/Page.stories.mdx',
-          options
-        );
-
-        const generator = new StoryIndexGenerator([specifier], {
-          ...options,
-        });
-        await generator.initialize();
-
-        expect(await generator.getIndex()).toMatchInlineSnapshot(`
-          {
-            "entries": {
-              "page--docs": {
-                "id": "page--docs",
-                "importPath": "./src/nested/Page.stories.mdx",
-                "name": "docs",
-                "storiesImports": [],
-                "tags": [
-                  "stories-mdx",
-                  "docs",
-                ],
-                "title": "Page",
-                "type": "docs",
-              },
-              "page--story-one": {
-                "id": "page--story-one",
-                "importPath": "./src/nested/Page.stories.mdx",
-                "name": "StoryOne",
-                "tags": [
-                  "stories-mdx",
-                  "story",
-                ],
-                "title": "Page",
-                "type": "story",
-              },
-            },
-            "v": 4,
-          }
-        `);
-      }, 20_000);
-    });
-
     describe('autodocs', () => {
       const autodocsOptions = {
         ...options,

code/lib/core-server/src/utils/__mockdata__/src/nested/Page.stories.mdx

@@ -1,5 +0,0 @@
-import { Meta, Story } from '@storybook/addon-docs';
-
-<Meta component={{}} />
-
-<Story name="StoryOne" />

code/lib/core-server/src/utils/__tests__/index-extraction.test.ts

@@ -604,53 +604,4 @@ describe('docs entries from story extraction', () => {
       }
     `);
   });
-  it(`Only adds a docs entry and not a story entry when an input has the "docsOnly" tag`, async () => {
-    const relativePath = './src/nested/Page.stories.mdx';
-    const absolutePath = path.join(options.workingDir, relativePath);
-    const specifier: NormalizedStoriesSpecifier = normalizeStoriesEntry(relativePath, options);
-
-    const generator = new StoryIndexGenerator([specifier], {
-      ...options,
-      docs: { defaultName: 'docs', autodocs: false },
-      indexers: [
-        {
-          test: /\.stories\.mdx?$/,
-          createIndex: async (fileName) => [
-            {
-              exportName: '__page',
-              __id: 'page--page',
-              name: 'Page',
-              title: 'Page',
-              tags: [STORIES_MDX_TAG, 'stories-mdx-docsOnly'],
-              importPath: fileName,
-              type: 'story',
-            },
-          ],
-        },
-      ],
-    });
-    const result = await generator.extractStories(specifier, absolutePath);
-
-    expect(result).toMatchInlineSnapshot(`
-      {
-        "dependents": [],
-        "entries": [
-          {
-            "id": "page--docs",
-            "importPath": "./src/nested/Page.stories.mdx",
-            "name": "docs",
-            "storiesImports": [],
-            "tags": [
-              "stories-mdx",
-              "stories-mdx-docsOnly",
-              "docs",
-            ],
-            "title": "Page",
-            "type": "docs",
-          },
-        ],
-        "type": "stories",
-      }
-    `);
-  });
 });

code/lib/core-server/src/utils/stories-json.test.ts

@@ -4,8 +4,6 @@ import type { Router, Request, Response } from 'express';
 import Watchpack from 'watchpack';
 import path from 'path';
 import debounce from 'lodash/debounce.js';
-// @ts-expect-error -- cannot find declaration file
-import { createStoriesMdxIndexer } from '@storybook/addon-docs/preset';
 import { STORY_INDEX_INVALIDATED } from '@storybook/core-events';
 import { normalizeStoriesEntry } from '@storybook/core-common';
 
@@ -45,7 +43,7 @@ const getInitializedStoryIndexGenerator = async (
 ) => {
   const options: StoryIndexGeneratorOptions = {
     storyIndexers: [],
-    indexers: [csfIndexer, createStoriesMdxIndexer(false)],
+    indexers: [csfIndexer],
     configDir: workingDir,
     workingDir,
     storyStoreV7: true,
@@ -239,29 +237,6 @@ describe('useStoriesJson', () => {
               "title": "nested/Button",
               "type": "story",
             },
-            "nested-page--docs": {
-              "id": "nested-page--docs",
-              "importPath": "./src/nested/Page.stories.mdx",
-              "name": "docs",
-              "storiesImports": [],
-              "tags": [
-                "stories-mdx",
-                "docs",
-              ],
-              "title": "nested/Page",
-              "type": "docs",
-            },
-            "nested-page--story-one": {
-              "id": "nested-page--story-one",
-              "importPath": "./src/nested/Page.stories.mdx",
-              "name": "StoryOne",
-              "tags": [
-                "stories-mdx",
-                "story",
-              ],
-              "title": "nested/Page",
-              "type": "story",
-            },
             "second-nested-g--story-one": {
               "id": "second-nested-g--story-one",
               "importPath": "./src/second-nested/G.stories.ts",

code/renderers/html/template/stories/html-mdx.stories.mdx

@@ -1,21 +0,0 @@
-import { Meta, Story, Canvas } from '@storybook/addon-docs';
-
-<Meta title="html/html-mdx" />
-
-## HTML-specific MDX Stories
-
-<Canvas>
-  <Story name="Basic" height="100px">
-    {'<h1>Hello World</h1>'}
-  </Story>
-</Canvas>
-
-<Canvas>
-  <Story name="Function" height="100px">
-    {() => {
-      const btn = document.createElement('button');
-      btn.innerHTML = 'Hello Button';
-      return btn;
-    }}
-  </Story>
-</Canvas>

code/renderers/svelte/template/stories/svelte-mdx.stories.mdx

@@ -1,48 +0,0 @@
-import { global as globalThis } from '@storybook/global';
-import { Meta, Story, Canvas } from '@storybook/addon-docs';
-import ButtonView from './views/ButtonJavaScript.svelte';
-import BorderDecoratorRed from './views/BorderDecoratorRed.svelte';
-
-<Meta title="stories/renderers/svelte/svelte-mdx" />
-
-# Svelte-specific MDX stories
-
-## Primary
-
-<Canvas>
-  <Story name="Primary">
-    {{
-      Component: ButtonView,
-      props: {
-        primary: true,
-        text: 'Primary text',
-      },
-    }}
-  </Story>
-</Canvas>
-
-## Secondary
-
-<Canvas>
-  <Story name="Secondary">
-    {{
-      Component: ButtonView,
-      props: {
-        primary: false,
-        text: 'Secondary text',
-      },
-    }}
-  </Story>
-</Canvas>
-
-<Canvas>
-  <Story name="WithDecorator" decorators={[() => BorderDecoratorRed]}>
-    {{
-      Component: ButtonView,
-      props: {
-        primary: false,
-        text: 'Secondary text',
-      },
-    }}
-  </Story>
-</Canvas>

code/renderers/vue3/template/stories/vue3-mdx.stories.mdx

@@ -1,46 +0,0 @@
-import { global as globalThis } from '@storybook/global';
-import { Meta, Story, Canvas } from '@storybook/addon-docs';
-
-<Meta title="stories/renderers/vue3/vue3-mdx" />
-
-# Vue3-specific MDX Stories
-
-export const Button = globalThis.Components.Button;
-
-export const Template = (args, { argTypes }) => ({
-  components: { MyButton: Button },
-  template: '<my-button v-bind="args" />',
-  setup() {
-    return { args };
-  },
-});
-
-## Primary
-
-<Canvas>
-  <Story name="Primary">
-    {{
-      components: { MyButton: Button },
-      template: '<my-button :primary="true" label="Primary button" />',
-    }}
-  </Story>
-</Canvas>
-
-## Secondary
-
-<Canvas>
-  <Story name="Secondary">
-    {{
-      components: { MyButton: Button },
-      template: '<my-button :primary="false" label="Secondary button" />',
-    }}
-  </Story>
-</Canvas>
-
-## From template
-
-<Canvas>
-  <Story name="From Template" args={{ label: 'From template' }}>
-    {Template.bind({})}
-  </Story>
-</Canvas>