MediaWiki:Monobook.css
From MormonWiki
/* CSS placed here will affect users of the Monobook skin */
body.page-Main_Page #siteNotice,
body.page-Main_Page #Anonnotice {
display:none;
}
/* CSS placed here will affect users of the Monobook skin */
body.page-Main_Page #siteNotice,
body.page-Main_Page #Anonnotice {
display:none;
}