chore: remove deprecated gpu-process-crashed event (#40255)

Co-authored-by: John Kleinschmidt <jkleinsc@electronjs.org>

docs/api/app.md

@@ -377,20 +377,6 @@ page.
 
 Emitted whenever there is a GPU info update.
 
-### Event: 'gpu-process-crashed' _Deprecated_
-
-Returns:
-
-* `event` Event
-* `killed` boolean
-
-Emitted when the GPU process crashes or is killed.
-
-**Deprecated:** This event is superceded by the `child-process-gone` event
-which contains more information about why the child process disappeared. It
-isn't always because it crashed. The `killed` boolean can be replaced by
-checking `reason === 'killed'` when you switch to that event.
-
 ### Event: 'render-process-gone'
 
 Returns:

docs/breaking-changes.md

@@ -42,6 +42,19 @@ win.webContents.on('render-process-gone', (event, details) => { /* ... */ })
 webview.addEventListener('render-process-gone', (event) => { /* ... */ })
 ```
 
+### Removed: `gpu-process-crashed` event on `app`
+
+The `gpu-process-crashed` event on `app` has been removed.
+Use the new `child-process-gone` event instead.
+
+```js
+// Removed
+app.on('gpu-process-crashed', (event, killed) => { /* ... */ })
+
+// Replace with
+app.on('child-process-gone', (event, details) => { /* ... */ })
+```
+
 ## Planned Breaking API Changes (28.0)
 
 ### Behavior Changed: `WebContents.backgroundThrottling` set to false affects all `WebContents` in the host `BrowserWindow`