chore: remove MountNode component (#4075)

Author: layershifter

docs/src/examples/addons/MountNode/Types/MountNodeExampleMountNode.js

@@ -9,11 +9,6 @@ export {
   ConfirmProps,
   StrictConfirmProps,
 } from './dist/commonjs/addons/Confirm'
-export {
-  default as MountNode,
-  MountNodeProps,
-  StrictMountNodeProps,
-} from './dist/commonjs/addons/MountNode'
 export {
   default as Pagination,
   PaginationProps,

docs/src/examples/addons/MountNode/Types/index.js

@@ -3,7 +3,6 @@ export { Ref } from '@fluentui/react-component-ref'
 
 // Addons
 export Confirm from './addons/Confirm'
-export MountNode from './addons/MountNode'
 export Pagination from './addons/Pagination'
 export PaginationItem from './addons/Pagination/PaginationItem'
 export Portal from './addons/Portal'