Removing unneeded TODO file.

TODO

@@ -1,19 +0,0 @@
-See libtorrent/TODO for a list of TODO items.
-
-Polling during last phase of shutdown should be very quick, don't use
-normal timeout.
-
-Consider basing WindowPeer* on a common base class.
-
-Some kind of indication that a tracker request was tried, but won't be
-allowed since the tracker set a min interval.
-
-Make accumulate return the value, no refs please...
-
->   - seeing the number of seeds / leechers of a torrent on the main
->     screen (and the level of distribution between leechers);
-
->   - being able to delete not just the torrent file, but the files it
->     created from rtorrent.  Like when you start a torrent, but it is too
->     slow or broken or for various reasons you don't want to download it.
-