Update for 5.5 branch

DougGregor · DougGregor · commit fe787ca516e3 · 2021-07-19T16:35:35.000-07:00
diff --git a/lib/Sema/TypeCheckConcurrency.cpp b/lib/Sema/TypeCheckConcurrency.cpp
@@ -3133,7 +3133,6 @@ ActorIsolation ActorIsolationRequest::evaluate(
       switch (auto enclosingIsolation =
                   getActorIsolationOfContext(func->getDeclContext())) {
       case ActorIsolation::ActorInstance:
-      case ActorIsolation::DistributedActorInstance:
       case ActorIsolation::Independent:
       case ActorIsolation::Unspecified:
         // Do nothing.
