Remove comment syntax from ReactNativeTypes (#31457)

# Summary

I'm working to get the main `react-native` package parsable by modern
Flow tooling (both `flow-bundler`, `flow-api-translator`).

This diff trivially removes some redundant Flow comment syntax in
`ReactNativeTypes.js`, which fixes parsing under these newer tools.

## How did you test this change?

Files were pasted into `react-native-github` under fbsource, where Flow
validates ✅.

packages/react-native-renderer/src/ReactNativeTypes.js

@@ -132,9 +132,10 @@ declare const ensureNativeMethodsAreSynced: NativeMethods;
 (ensureNativeMethodsAreSynced: INativeMethods);
 
 export type HostInstance = NativeMethods;
-/*::
-export type HostComponent<Config: {...}> = component(ref: React$RefSetter<HostInstance>, ...Config);
-*/
+export type HostComponent<Config: {...}> = component(
+  ref: React$RefSetter<HostInstance>,
+  ...Config
+);
 
 type InspectorDataProps = $ReadOnly<{
   [propName: string]: string,
@@ -205,9 +206,7 @@ export type ReactNativeType = {
     componentOrHandle: ?(ElementRef<TElementType> | number),
   ): ?number,
   isChildPublicInstance(
-    // eslint-disable-next-line no-undef
     parent: PublicInstance | HostComponent<empty>,
-    // eslint-disable-next-line no-undef
     child: PublicInstance | HostComponent<empty>,
   ): boolean,
   dispatchCommand(