Fix links and remove dependencies (#505)

en/extras/babel/index.md

@@ -12,12 +12,7 @@ Babel maintains links between translated resources. In the manager you can use t
 
 Additionally, Babel can be used to synchronize certain template variables (TVs) of translated resources which should be the same in every context (language).
 
-## Requirements
-
-- MODX Revolution 2.8 or later
-- PHP 7.2 or later
-
-## History& Info
+## History & Info
 
 The Babel project was started in 2010 by [Jakob Class](https://github.com/mikrobi). It was improved further by [Rico Goldsky](https://github.com/goldsky), [Joshua Luckers](https://github.com/JoshuaLuckers) and [Thomas Jakobi](https://github.com/Jako).
 
@@ -31,4 +26,4 @@ Babel has a GitHub repository at <https://github.com/mikrobi/babel>
 
 ### Documentation
 
-The package documentation can be found at <http://mikrobi.github.io/babel/>
+The package documentation can be found at <https://mikrobi.github.io/babel/>