moved the help file to where it should be, in the current scheme.

git-svn-id: https://hudson.dev.java.net/svn/hudson/trunk/hudson/main@31705 71c3de6d-444a-0410-be80-ed276b4c234a

core/src/main/java/hudson/tasks/Shell.java

@@ -141,11 +141,6 @@ public class Shell extends CommandInterpreter {
             save();
         }
 
-        @Override
-        public String getHelpFile() {
-            return "/help/project-config/shell.html";
-        }
-
         public String getDisplayName() {
             return Messages.Shell_DisplayName();
         }