release actionbar docs (#3927)

Author: LFDanLu

packages/@react-spectrum/actionbar/docs/ActionBar.mdx

@@ -29,7 +29,6 @@ import {TableView, TableHeader, TableBody, Row, Column, Cell} from '@react-spect
 ---
 category: Toolbars
 keywords: [actionbar, selection, actions, collections, toolbar]
-after_version: 3.1.0
 ---
 
 # ActionBar