docs: remove new frame titles from sidebar.mdx

docs/src/content/docs/guides/sidebar.mdx

@@ -60,7 +60,6 @@ By combining links and groups, you can create a wide variety of sidebar layouts.
 Add a link to an internal or external page using an object with `label` and `link` properties.
 
 ```js "label:" "link:"
-// astro.config.mjs
 starlight({
 	sidebar: [
 		// A link to the CSS & Styling guide.
@@ -90,7 +89,6 @@ The `label` will be used as the heading for the group.
 Add links or subgroups to the `items` array.
 
 ```js /^\s*(label:|items:)/
-// astro.config.mjs
 starlight({
 	sidebar: [
 		// A group of links labelled "Guides".
@@ -145,7 +143,6 @@ Pages will be sorted alphabetically by filename by default.
 Add an autogenerated group using an object with `label` and `autogenerate` properties. Your `autogenerate` configuration must specify the `directory` to use for sidebar entries. For example, with the following configuration:
 
 ```js  "label:" "autogenerate:"
-// astro.config.mjs
 starlight({
 	sidebar: [
 		{
@@ -241,8 +238,7 @@ The `sidebar` frontmatter configuration is only used for autogenerated links and
 
 Links, groups, and autogenerated groups can also include a `badge` property to display a badge next to their label.
 
-```js {11,18}
-// astro.config.mjs
+```js {10,17}
 starlight({
 	sidebar: [
 		{
@@ -308,8 +304,7 @@ Customize the badge styling using an object with `text` and `variant` properties
 The `text` represents the content to display (e.g. "New").
 Override the `default` styling, which uses the accent color of your site, by setting the `variant` property to one of the following values: `note`, `tip`, `danger`, `caution` or `success`.
 
-```js {11}
-// astro.config.mjs
+```js {10}
 starlight({
 	sidebar: [
 		{
@@ -350,8 +345,7 @@ Links can also include an `attrs` property to add custom HTML attributes to the
 
 In the following example, `attrs` is used to add a `target="_blank"` attribute, so that the link opens in a new tab, and to apply a custom `style` attribute to italicize the link label:
 
-```js {11}
-// astro.config.mjs
+```js {10}
 starlight({
 	sidebar: [
 		{
@@ -394,8 +388,7 @@ The configuration above generates the following sidebar:
 Use the `translations` property on link and group entries to translate the link or group label for each supported language by specifying a [BCP-47](https://www.w3.org/International/questions/qa-choosing-language-tags) language tag, e.g. `"en"`, `"ar"`, or `"zh-CN"`, as the key and the translated label as the value.
 The `label` property will be used for the default locale and for languages without a translation.
 
-```js {6-8,12-14,19-21}
-// astro.config.mjs
+```js {5-7,11-13,18-20}
 starlight({
 	sidebar: [
 		{
@@ -442,8 +435,7 @@ Browsing the documentation in Brazilian Portuguese will generate the following s
 
 Groups of links can be collapsed by default by setting the `collapsed` property to `true`.
 
-```js {6-7}
-// astro.config.mjs
+```js {5-6}
 starlight({
 	sidebar: [
 		{
@@ -476,8 +468,7 @@ The configuration above generates the following sidebar:
 
 [Autogenerated groups](#autogenerated-groups) respect the `collapsed` value of their parent group:
 
-```js {6-7}
-// astro.config.mjs
+```js {5-6}
 starlight({
 	sidebar: [
 		{
@@ -514,8 +505,7 @@ The configuration above generates the following sidebar:
 
 This behavior can be overridden by defining the `autogenerate.collapsed` property.
 
-```js {6-8} "collapsed: true"
-// astro.config.mjs
+```js {5-7} "collapsed: true"
 starlight({
 	sidebar: [
 		{