Remove unnecessary `@SuppressWarnings("unchecked")` from LinkedFlowScope.
@@ -239,7 +239,6 @@ class LinkedFlowScope implements FlowScope {
/** Join the two FlowScopes. */
static class FlowScopeJoinOp extends JoinOp.BinaryJoinOp<FlowScope> {
- @SuppressWarnings("unchecked")
@Override
public FlowScope apply(FlowScope a, FlowScope b) {
// To join the two scopes, we have to
