Bug 307911 profiles_help says Roaming not available in installer-build

p=opitz.michael@inode.at r=me

extensions/help/resources/locale/en-US/profiles_help.xhtml

@@ -111,9 +111,6 @@
 
 <h2 id="roaming_profiles">Roaming Profiles</h2>
 
-<p class="noMac"><strong>Note</strong>: This feature is not yet available in
-  the installer builds of &brandShortName;.</p>
-
 <p>Roaming profiles allow you to store your profile and associated settings on
   a central server or file share. The advantage of this is that your settings
   can follow you from one machine to another. For example, you may wish to use