Remove unnecessary code

Author: cziegeler

webconsole/src/main/java/org/apache/felix/webconsole/internal/servlet/OsgiManager.java

@@ -465,7 +465,6 @@ void doService(HttpServletRequest request, HttpServletResponse response)
                 path = path.concat("/");
             }
             path = path.concat(holder.getDefaultPluginLabel());
-            response.setContentLength(0);
             response.sendRedirect(path);
             return;
         }