[accordion] Remove deprecated props of AccordionSummary

docs/data/material/migration/upgrade-to-v9/upgrade-to-v9.md

@@ -537,6 +537,24 @@ Use the `slots` and `slotProps` props instead:
  >
 ```
 
+#### AccordionSummary deprecated CSS classes removed
+
+Use the [accordion-summary-classes codemod](https://github.com/mui/material-ui/tree/HEAD/packages/mui-codemod#accordion-summary-classes) below to migrate the code as described in the following section:
+
+```bash
+npx @mui/codemod@latest deprecations/accordion-summary-classes <path>
+```
+
+The deprecated `AccordionSummary` CSS class `contentGutters` has been removed.
+Use the combination of `.MuiAccordionSummary-gutters` and `.MuiAccordionSummary-content` classes instead:
+
+```diff
+-.MuiAccordionSummary-contentGutters {
++.MuiAccordionSummary-gutters .MuiAccordionSummary-content {
+   margin: 20px 0;
+ }
+```
+
 #### AvatarGroup deprecated props removed
 
 Use the [avatar-group-props codemod](https://github.com/mui/material-ui/tree/HEAD/packages/mui-codemod#avatar-group-props) below to migrate the code as described in the following section:

docs/pages/material-ui/api/accordion-summary.json

@@ -52,13 +52,6 @@
     }
   ],
   "classes": [
-    {
-      "key": "contentGutters",
-      "className": "MuiAccordionSummary-contentGutters",
-      "description": "Styles applied to the children wrapper element unless `disableGutters={true}`.",
-      "isGlobal": false,
-      "isDeprecated": true
-    },
     {
       "key": "disabled",
       "className": "Mui-disabled",

docs/translations/api-docs/accordion-summary/accordion-summary.json

@@ -14,12 +14,6 @@
     }
   },
   "classDescriptions": {
-    "contentGutters": {
-      "description": "Styles applied to {{nodeName}} unless {{conditions}}.",
-      "nodeName": "the children wrapper element",
-      "conditions": "<code>disableGutters={true}</code>",
-      "deprecationInfo": "Combine the <a href=\"/material-ui/api/accordion-summary/#accordion-summary-classes-MuiAccordionSummary-gutters\">.MuiAccordionSummary-gutters</a> and <a href=\"/material-ui/api/accordion-summary/#AccordionSummary-css-MuiAccordionSummary-content\">.MuiAccordionSummary-content</a> classes instead. See <a href=\"/material-ui/migration/migrating-from-deprecated-apis/\">Migrating from deprecated APIs</a> for more details."
-    },
     "disabled": {
       "description": "State class applied to {{nodeName}} if {{conditions}}.",
       "nodeName": "the root element",

packages/mui-material/src/AccordionSummary/AccordionSummary.js

@@ -19,7 +19,7 @@ const useUtilityClasses = (ownerState) => {
   const slots = {
     root: ['root', expanded && 'expanded', disabled && 'disabled', !disableGutters && 'gutters'],
     focusVisible: ['focusVisible'],
-    content: ['content', expanded && 'expanded', !disableGutters && 'contentGutters'],
+    content: ['content', expanded && 'expanded'],
     expandIconWrapper: ['expandIconWrapper', expanded && 'expanded'],
   };
 

packages/mui-material/src/AccordionSummary/accordionSummaryClasses.ts

@@ -12,11 +12,6 @@ export interface AccordionSummaryClasses {
   disabled: string;
   /** Styles applied to the root element unless `disableGutters={true}`. */
   gutters: string;
-  /**
-   * Styles applied to the children wrapper element unless `disableGutters={true}`.
-   * @deprecated Combine the [.MuiAccordionSummary-gutters](/material-ui/api/accordion-summary/#accordion-summary-classes-MuiAccordionSummary-gutters) and [.MuiAccordionSummary-content](/material-ui/api/accordion-summary/#AccordionSummary-css-MuiAccordionSummary-content) classes instead. See [Migrating from deprecated APIs](/material-ui/migration/migrating-from-deprecated-apis/) for more details.
-   */
-  contentGutters: string;
   /** Styles applied to the children wrapper element. */
   content: string;
   /** Styles applied to the `expandIcon`'s wrapper element. */
@@ -31,16 +26,7 @@ export function getAccordionSummaryUtilityClass(slot: string): string {
 
 const accordionSummaryClasses: AccordionSummaryClasses = generateUtilityClasses(
   'MuiAccordionSummary',
-  [
-    'root',
-    'expanded',
-    'focusVisible',
-    'disabled',
-    'gutters',
-    'contentGutters',
-    'content',
-    'expandIconWrapper',
-  ],
+  ['root', 'expanded', 'focusVisible', 'disabled', 'gutters', 'content', 'expandIconWrapper'],
 );
 
 export default accordionSummaryClasses;