Remove keyjs.dev link under the key codes inspection snippet.

Author: Danziger

2-ui/3-event-details/7-keyboard-events/article.md

@@ -21,8 +21,6 @@ Try different key combinations in the text field.
 [codetabs src="keyboard-dump" height=480]
 ```
 
-If you'd like to see some of the many other properties inside a `KeyboardEvent`, you can use [Key.js](https://keyjs.dev), a similar keyboard event inspection tool.
-
 
 ## Keydown and keyup