linea de division

[lobbys]

ok puse mis lineas de division y me salio bien pero hay una linea que dese o quitarla y es la que estaen novedades del "menu principal! ayuda please..!!!!!!!!!!!. Para un mejor entendimiento mando el link de la pag web y el codigo: uigvvirtual.org/pruebas/

/***
*** Blocks
***/

/*Accessibility: Skip block link, for keyboard-only users. */
a.skip-block, a.skip {
position: absolute;
top: -1000em;
font-size: 0.85em;
}

a.skip-block:focus, a.skip-block:active,
a.skip:focus, a.skip:active {
position: static;
display: block;
border-bottom: 0px;
}

.skip-block-to, #maincontent {
display: block;
height: 1px;
border-bottom: 0px;
}

.sideblock {
border-width: 1px;
border-style: solid;
margin-bottom:1em;
width: 100%;
}

.sideblock .header, .sideblock h2.header {
text-align: center;
margin:0px;
padding:4px;
padding-top:2px;
border-style: solid;
border-width: 0px;
}
.sideblock h2 {
margin:0;
padding:1px;
}

.sideblock .header .hide-show-image {
float:right;
height:11px;
width:11px;
margin-top:0.25em;
border-bottom:0px;
}

.sideblock .header .commands {
margin-top: 0.3em;
clear: both;
height: 16px;
}

.sideblock .header .commands a {
margin: 0px 9px;
}

#left-column .hidden .header,
#right-column .hidden .header
{
border-bottom-width: 0px ;
border-bottom-style: none;
}

#left-column .hidden .content,
#right-column .hidden .content
{
display: inline;
border: 1px;
}

.sideblock .header .icon.hide,
.sideblock .header .icon.edit {
margin-right: 3px;
}

.sideblock .content {
padding: 7px;
border-width: 0px;
}

.sideblock .content h3,
.sideblock .content h2 {
text-align: left;
}

.sideblock .content h2 {
margin:0em 0em 0em;
padding:2px;
}

.sideblock .content .head {
margin-top: 10px;

}

.sideblock .content hr {
height:1px;
margin-top:2px;
margin-bottom:0px ;
border-bottom: 0px;
border:2px ;
border-top:1px solid;



}

.sideblock div.column {
margin:2px;
margin-right:4px;
padding:3px;
}

.sideblock div.column.c0 {
float: left;
}

.sideblock div.column.c1 {
display: inline;
}

.sideblock .content .c0 img.icon {
margin:2px;

}

.sideblock .content .list, .unlist, .inline-list {
list-style:none;
padding:5px;
margin:1px;

}

.sideblock .content .list {
width: 100%;
}

.sideblock .content .list li {
clear: left;
border-bottom-style:solid;
border-width: 1px;
margin-right: 10px;
color: #D4D4D5;

}

.sideblock .content .inline-list li, .inline-list li {
display: inline;
}

.sideblock .content ul.list li.listentry {
clear:both;
}

.sideblock .content div.info {
text-align:center;
}

.sideblock .footer {
margin-bottom: 1px;
text-align:center;
clear:both;
}

.sideblock img.userpicture {
width:10px;
height:10px;
margin-right:4px;

}

.blockconfigtable {
margin-top: 3px;
margin-right: auto;
margin-left: auto;
margin.bottom: 3px;
border-style: 0px;
}

.blockconfigtable td.label {
text-align: right;
width: 50%;

}

.blockconfigtable td.value {
text-align: left;
width: 50%;
}

.blockconfigtable td.submit {
text-align: center;
}

.blockconfiginstancecontent .tabs {
margin-bottom: 2px;
margin-left: auto;
margin-right: auto;
}

.block_adminblock {
width: 180px;

}

.block_messages .content {
text-align:left;
font-size:0.75em;
padding-top:7px;
}

.block_recent_activitysideblock .h3 {
padding-top:5px;

}

.block_online_users .listentry div.user,
.block_messages .listentry div.user {
float:left;
}

.block_online_users .listentry div.message,
.block_messages .listentry div.message {
float:right;
}

.block_course_list .footer {
margin-top: 5px;
}

#rssfeeds {
margin-left: auto;
margin-right: auto;
}

#block_rss {
text-align: center;
}

.block_search_forums .invisiblefieldset {
display: none;
}

.block_tag_youtube .youtube-thumb {
padding: 3px;
padding-bottom: 2em;
display: inline;
float: left;
}

.block_tag_youtube .yt-video-entry li {
clear: left;
}

.block_tag_flickr .flickr-photos {
padding:3px;
}