Revert "XWIKI-7930: Invitation.InvitationMessages page should be set to hidden when it is created."

Wrong branch.
This reverts commit ddb521a5.

xwiki-platform-core/xwiki-platform-invitation/src/main/resources/Invitation/InvitationCommon.xml

@@ -865,8 +865,6 @@
     #set($emailContainerContent = '{{velo' + 'city}}{{info}}$msg.get("xe.invitation.internalDocument", ["'
                                   + "$config.get('emailContainer')" + '"]){{/info}}{{/velo' + 'city}}')
     #set($discard = $emailContainer.setContent($emailContainerContent))
-    #set($discard = $emailContainer.setHidden(true))
-    #set($discard = $emailContainer.saveAsAuthor())
   #end
   ##
   ## Load messages into a Map by messageID.