docs: remove stale parentType param from validateChildKeys JSDoc (#36928)

`validateChildKeys` in `packages/react/src/jsx/ReactJSXElement.js` had a signature of `validateChildKeys(node, parentType)`, but #34174 ("Remove unused arguments from ReactElement") dropped the second argument, changing the signature to `validateChildKeys(node)` and updating every call site to pass a single argument. That change removed several now-unused `@param` lines from the same file, but left one behind on `validateChildKeys`: ```js /** * ... * @internal * @param {ReactNode} node Statically passed child of any type. * @param {*} parentType node's parent's type. // <- no such parameter anymore */ function validateChildKeys(node) { ``` `parentType` no longer appears anywhere in the function signature or body, so this `@param` line is stale and misleading to anyone reading the doc comment. This PR deletes that single line. The remaining `@param {ReactNode} node` already fully and correctly documents the sole parameter. No code or behavior change. ## How did you test this change? This is a documentation-only change (a JSDoc comment on an `@internal` helper), so there is no runtime behavior to test. I verified it as follows: - Confirmed `parentType` no longer appears anywhere in `packages/react/src/jsx/ReactJSXElement.js` (`grep -n parentType` returns no matches after the change). - Confirmed the signature `function validateChildKeys(node)` and all call sites are unchanged by this diff. - `yarn prettier` (via `scripts/prettier/index.js check-changed`) - clean. - `yarn linc` (ESLint on changed files) - passed. - `yarn flow dom-node` - No errors. --- ## Diff (for reference) ```diff diff --git a/packages/react/src/jsx/ReactJSXElement.js b/packages/react/src/jsx/ReactJSXElement.js @@ -860,7 +860,6 @@ export function cloneElement(element, config, children) { * * @internal * @param {ReactNode} node Statically passed child of any type. - * @param {*} parentType node's parent's type. */ function validateChildKeys(node) { ```