fix(css): fix broken link and remove IE related stuff (#30733)

files/en-us/learn/css/css_layout/supporting_older_browsers/index.md

@@ -197,18 +197,10 @@ Support for feature queries is very good across modern browsers. However, you sh
 
 The specification for feature queries also contains the ability to test if a browser does not support a feature — this is only helpful if the browser does support feature queries. In the future, an approach of checking for lack of support will work, as the browsers that don't have feature query support go away. For now, however, use the approach of doing the older CSS, then overwriting it, for the best support.
 
-## The IE10 and 11 prefixed version of Grid
-
-The CSS Grid specification was initially prototyped In Internet Explorer 10; this means that while IE10 and IE11 do not have _modern_ grid support, they do have a version of Grid layout that is very usable, although different to the modern specification documented on this site. The IE10 and 11 implementations is `-ms-` prefixed, which means you can use it for these browsers and it will be ignored by non-Microsoft browsers. Edge does still understand the old syntax, however, so take care that everything is safely overwritten in your modern grid CSS.
-
-The guide to [Progressive Enhancement in Grid Layout](/en-US/docs/Web/CSS/CSS_grid_layout/Grid_layout_and_progressive_enhancement) can help you understand the IE version of the grid, and we have included some additional useful links at the end of this lesson. However, unless you have a very high number of visitors in older IE versions, you may find it better to focus on creating a fallback that works for all non-supporting browsers.
-
 ## Testing older browsers
 
 With the majority of browsers supporting Flexbox and Grid, it can be reasonably hard to test older browsers. One way is to use an online testing tool such as Sauce Labs, as detailed in the [Cross browser testing](/en-US/docs/Learn/Tools_and_testing/Cross_browser_testing) module.
 
-You can also download and install virtual machines, and run older versions of browsers in a contained environment on your computer. If you are still required to support Internet Explorer, Microsoft provides [a range of Virtual Machines available for free download](https://developer.microsoft.com/en-us/microsoft-edge/tools/vms/). These are available for Mac, Windows and Linux operating systems and so are a great way to test in old and modern Windows browsers even if you are not using a Windows computer.
-
 ## Summary
 
 You now have the knowledge to confidently use techniques such as Grid, create fallbacks for older browsers, and make use of any new techniques that might come along in the future.
@@ -221,8 +213,6 @@ Now that you have worked through our articles on CSS layout, it's time to test y
 - [Backwards Compatibility of Flexbox](/en-US/docs/Web/CSS/CSS_flexible_box_layout/Backwards_compatibility_of_flexbox)
 - [CSS Grid Layout and Progressive Enhancement](/en-US/docs/Web/CSS/CSS_grid_layout/Grid_layout_and_progressive_enhancement)
 - [Using CSS Grid: Supporting Browsers Without Grid](https://www.smashingmagazine.com/2017/11/css-grid-supporting-browsers-without-grid/)
-- [A tutorial which uses the IE10 and 11 version of Grid](https://24ways.org/2012/css3-grid-layout/)
-- [Should I try to use the IE10 implementation of Grid Layout?](https://rachelandrew.co.uk/archives/2016/11/26/should-i-try-to-use-the-ie-implementation-of-css-grid-layout/)
 - [Cascading Web Design with Feature Queries](https://24ways.org/2017/cascading-web-design/)
 - [Using Feature Queries (Video)](https://gridbyexample.com/learn/2016/12/24/learning-grid-day24/)