follow-up on #11, suggested description no longer makes sense here, a…

…s it applies to all kind of variables

src/main/resources/org/jenkinsci/plugins/gwt/GenericHeaderVariable/config.jelly

@@ -2,9 +2,6 @@
 <j:jelly xmlns:j="jelly:core" xmlns:st="jelly:stapler" xmlns:d="jelly:define" xmlns:l="/lib/layout" xmlns:t="/lib/hudson" xmlns:f="/lib/form">
   <f:entry title="Variable" description="Name of variable">
     <f:textbox field="key"/>
-    <f:description>
-     Header name. The associated variable will have "-" characters transformed to "_", so content-type header would get published as content_type.
-    </f:description>
   </f:entry>
 
   <f:entry title="Value filter">