reset some github styling

user.css

div.global-notice.warn {
    display: none;
}

span.setting_warning {
    display: none;
}

div.octofication {
    display: none;
}

a.notification-indicator.tooltipped.downwards {
    display: none;
}

div#dashboard span.mini-icon {
    display: none;
}

div.news span.mini-icon {
    display: none;
}

div.pagehead p.tip {
    display: none;
}