Actor.cpp: Fix unused variables for non-embedded path

Author: MaxDesiatov

stdlib/public/Concurrency/Actor.cpp

@@ -2710,15 +2710,17 @@ static void swift_task_enqueueImpl(Job *job, SerialExecutorRef serialExecutorRef
     return swift_defaultActor_enqueue(job, serialExecutorRef.getDefaultActor());
   }
 
+#if SWIFT_CONCURRENCY_EMBEDDED && defined(__wasi__)
   auto serialExecutorIdentity = serialExecutorRef.getIdentity();
   auto serialExecutorWtable = serialExecutorRef.getSerialExecutorWitnessTable();
-#if SWIFT_CONCURRENCY_EMBEDDED && defined(__wasi__)
   _swift_task_enqueueOnExecutor(job, serialExecutorIdentity, serialExecutorWtable);
 #elif SWIFT_CONCURRENCY_EMBEDDED
   swift_unreachable("custom executors not supported in embedded Swift");
 #else
   // For main actor or actors with custom executors
+  auto serialExecutorIdentity = serialExecutorRef.getIdentity();
   auto serialExecutorType = swift_getObjectType(serialExecutorIdentity);
+  auto serialExecutorWtable = serialExecutorRef.getSerialExecutorWitnessTable();
   _swift_task_enqueueOnExecutor(job, serialExecutorIdentity, serialExecutorType,
                                 serialExecutorWtable);
 #endif // SWIFT_CONCURRENCY_EMBEDDED