Update AEMSupport.adoc

Author: jbornemann

docs/AEMSupport.adoc

@@ -13,7 +13,7 @@
 ```
 We follow link:http://semver.org/[semantic versioning]. Installation of different major versions between machines are unsupported, and likely incompatible.
 
-Active development is on the "master" branch, which is currently the 6.x version line. Security patches and the like are sometimes back-ported to prior versions.
+Active development is on the "master" branch. Security patches and the like are sometimes back-ported to prior versions.
 
 Of course pull-requests are happily accepted for those that would like to submit things like back-porting features for AEM 5.6, etc.