first try rebooting the phone , (or as root : killall hildon-status-menu)
if you figure out which package made this show up , just remove it , if you don't know you can remove it manually..
this applet is in position 7 on the status menu..
so edit /etc/hildon-desktop/status-menu.plugins and comment out the plugin that has X-Status-Menu-Position=7
or just see it's name in the file and remove that package .