upstream: delete stale TODO (#8028)

This was fixed in #7877

Signed-off-by: Matt Klein <mklein@lyft.com>

source/common/upstream/upstream_impl.cc

@@ -1311,12 +1311,6 @@ bool BaseDynamicClusterImpl::updateDynamicHostList(const HostVector& new_hosts,
 
   // At this point we've accounted for all the new hosts as well the hosts that previously
   // existed in this priority.
-
-  // TODO(mattklein123): This stat is used by both the RR and LR load balancer to decide at
-  // runtime whether to use either the weighted or unweighted mode. If we extend weights to
-  // static clusters or DNS SRV clusters we need to make sure this gets set. Better, we should
-  // avoid pivoting on this entirely and probably just force a host set refresh if any weights
-  // change.
   info_->stats().max_host_weight_.set(max_host_weight);
 
   // Whatever remains in current_priority_hosts should be removed.