[FEATURE] Ability to switch content packs so that vendors can offer regional content.

Original patch from jbetak@netscape.com, r=ben@netscape.com, sr=hyatt@netscape.com,
a=blizzard@mozilla.org
brand.properties - remove unnecessary string

xpfe/global/resources/locale/en-US/brand.properties

@@ -1,3 +1,3 @@
 brandShortName=Mozilla
 vendorShortName=Mozilla
-langAlert=Please restart Mozilla to use the new Languages and Web Content setting.
+