It is only rendered if you have this in theme.skin:
<portal:mojoPanel runat="server" RenderArtisteer="true" UseLowerCaseArtisteerClasses="true" />
<portal:ModuleTitleControl runat="server" RenderArtisteer="true" UseLowerCaseArtisteerClasses="true" />
<portal:mojoButton runat="server" RenderArtisteer="true" CssClass="art-button" />
non-artisteer skins do not have this and do not render the markup.
The only exception is when running in medium trust, then all skins use the theme.skin file from /App_Themes/Default/theme.skin, so if you running in medium trust and are not using any artisteer skins you would want to remove the settings from that file.
Hope it helps,
Joe