[Collapsible] Remove deprecated Collapsible argument (#7397)

### WHY are these changes introduced?

Removes a deprecated argument on the Collapsible component with the
major version bump.

### WHAT is this pull request doing?

Removes the prop as a breaking change.

### How to 🎩

🖥 [Local development
instructions](https://github.com/Shopify/polaris/blob/main/README.md#local-development)
🗒 [General tophatting
guidelines](https://github.com/Shopify/polaris/blob/main/documentation/Tophatting.md)
📄 [Changelog
guidelines](https://github.com/Shopify/polaris/blob/main/.github/CONTRIBUTING.md#changelog)

N/A tophatting instructions as Polaris does not use this prop
internally.

### 🎩 checklist

- [ ] Tested on
[mobile](https://github.com/Shopify/polaris/blob/main/documentation/Tophatting.md#cross-browser-testing)
- [ ] Tested on [multiple
browsers](https://help.shopify.com/en/manual/shopify-admin/supported-browsers)
- [ ] Tested for
[accessibility](https://github.com/Shopify/polaris/blob/main/documentation/Accessibility%20testing.md)
- [ ] Updated the component's `README.md` with documentation changes
- [ ] [Tophatted
documentation](https://github.com/Shopify/polaris/blob/main/documentation/Tophatting%20documentation.md)
changes in the style guide

Author: Bringer128

.changeset/stupid-vans-kick.md

@@ -0,0 +1,5 @@
+---
+'@shopify/polaris': major
+---
+
+Removed deprecated preventMeasuringOnChildUpdate prop on Collapsible

polaris-react/src/components/Collapsible/Collapsible.tsx

@@ -22,8 +22,6 @@ export interface CollapsibleProps {
    * @default transition={{duration: 'var(--p-duration-150)', timingFunction: 'var(--p-ease-in-out)'}}
    */
   transition?: boolean | Transition;
-  /** @deprecated Re-measuring is no longer necessary on children update **/
-  preventMeasuringOnChildrenUpdate?: boolean;
   /** The content to display inside the collapsible. */
   children?: React.ReactNode;
 }
@@ -35,7 +33,6 @@ export function Collapsible({
   expandOnPrint,
   open,
   transition = true,
-  preventMeasuringOnChildrenUpdate: _preventMeasuringOnChildrenUpdate,
   children,
 }: CollapsibleProps) {
   const [height, setHeight] = useState(0);