[7.1 Alpha Release Notes] Remove Create a Custom Module

Comment from bstansbe@redhat.com
Create a Custom Module
This general feature we've had since EAP 6.0 as well, although there were some small improvements in 7.1. The general feature was TP before, so perhaps it's "new" now, but I suspect people familiar with it will find it confusing to treat it as if it's brand new.

https://issues.jboss.org/browse/JBEAP-8941?focusedCommentId=13382507&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-13382507

Comment from bilge:
https://issues.jboss.org/browse/JBEAP-8941?focusedCommentId=13382601&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-13382601
Create Custom Module
requires a better title and description; I think this is related to https://issues.jboss.org/browse/EAP7-519