[zh-tw] sync translated content (#12704)

* zh-tw: sync translated content

* remove ARIA/forms

ref: mdn/content#26140

---------

Co-authored-by: Allo <yin199909@aliyun.com>

files/zh-tw/_redirects.txt

@@ -604,6 +604,7 @@
 /zh-TW/docs/Web/API/XMLHttpRequest/onreadystatechange	/zh-TW/docs/Web/API/XMLHttpRequest/readystatechange_event
 /zh-TW/docs/Web/API/document.createTreeWalker	/zh-TW/docs/Web/API/Document/createTreeWalker
 /zh-TW/docs/Web/API/document.querySelector	/zh-TW/docs/Web/API/Document/querySelector
+/zh-TW/docs/Web/Accessibility/ARIA/forms	/zh-TW/docs/Web/Accessibility/ARIA
 /zh-TW/docs/Web/Accessibility/ARIA/forms/Basic_form_hints	/zh-TW/docs/Web/Accessibility/ARIA
 /zh-TW/docs/Web/Apps/Progressive	/zh-TW/docs/Web/Progressive_web_apps
 /zh-TW/docs/Web/CSS/-moz-border-image	/zh-TW/docs/Web/CSS/border-image

files/zh-tw/_wikihistory.json

@@ -2931,10 +2931,6 @@
     "modified": "2019-03-18T21:39:54.388Z",
     "contributors": ["oooooo"]
   },
-  "Web/Accessibility/ARIA/forms": {
-    "modified": "2019-06-27T12:10:30.271Z",
-    "contributors": ["FredericChang", "Sheppy"]
-  },
   "Web/Accessibility/Mobile_accessibility_checklist": {
     "modified": "2019-03-18T21:32:14.782Z",
     "contributors": ["li-liam"]

files/zh-tw/web/accessibility/aria/index.md

@@ -26,8 +26,6 @@ ARIA is implemented in most popular browsers and screen readers. However, implem
 
 - [Enhancing Page Navigation with ARIA Landmarks](http://www.paciellogroup.com/blog/2010/10/using-wai-aria-landmark-roles/)
   - : A nice intro to using ARIA landmarks to improve web page navigation for screen reader users. [See also, ARIA landmark implementation notes](http://www.paciellogroup.com/blog/2011/07/html5-accessibility-chops-aria-landmark-support/) and examples on real sites (updated as of July '11).
-- [Improving Form Accessibility](/zh-TW/docs/ARIA/forms)
-  - : ARIA is not just for dynamic content! Learn how to improve accessibility of HTML forms using additional ARIA attributes.
 - [Live regions (work-in-progress)](/zh-TW/docs/Accessibility/ARIA/ARIA_Live_Regions)
   - : Live regions provide suggestions to screen readers about how to handle changes to the contents of a page.
 - [Using ARIA Live Regions to Announce Content Changes](http://www.freedomscientific.com/Training/Surfs-up/AriaLiveRegions.htm)