fix: always move duplicate peer_info to graveyard pool (#5941)

libtransmission/peer-mgr.cc

@@ -746,11 +746,8 @@ private:
             TR_ASSERT(it != std::end(peers));
             (*it)->do_purge = true;
 
-            if (was_connectable)
-            {
             // Note that it_that is invalid after this point
             graveyard_pool.insert(connectable_pool.extract(it_that));
-            }
 
             return false;
         }