The page menu is generated by the page menu control
<portal:pagemenu id="PageMenu1" runat="server" useflexmenu="true"></portal:pagemenu> on line 61 of the layout.master of the skin. Removing this line of code will remove the menu.
To find the layout.master FTP to your site and go to Data/Sites/your_site_number/skins/art41-wallpaper/.
Hope that helps,