Distributed: reenable distributed_actor_init_local.swift

The issue in rdar://92952551 appears to have been resolved.

Author: kavon

test/Distributed/Runtime/distributed_actor_init_local.swift

@@ -10,9 +10,6 @@
 // UNSUPPORTED: back_deployment_runtime
 
 
-// FIXME(distributed): Seems something remains incorrect here
-// REQUIRES: rdar92952551
-
 import Distributed
 
 enum MyError: Error {