fix: bitswap cleanup live wants on cancel

Otherwise, live wants get rebroadcasted forever, even when we canceled those.

This PR exists to have a branch to test #690

bitswap/client/internal/session/sessionwants.go

@@ -148,6 +148,7 @@ func (sw *sessionWants) PrepareBroadcast() []cid.Cid {
 func (sw *sessionWants) CancelPending(keys []cid.Cid) {
 	for _, k := range keys {
 		sw.toFetch.Remove(k)
+		delete(sw.liveWants, k)
 	}
 }