Fix verbose shutdown error and test_env_with_subprocesses (#6614)

python/ray/_raylet.pyx

@@ -787,11 +787,6 @@ cdef class CoreWorker:
             node_ip_address.encode("utf-8"), node_manager_port,
             task_execution_handler, check_signals, True))
 
-    def disconnect(self):
-        self.destory_event_loop_if_exists()
-        with nogil:
-            self.core_worker.get().Disconnect()
-
     def run_task_loop(self):
         with nogil:
             self.core_worker.get().StartExecutingTasks()

python/ray/actor.py

@@ -819,7 +819,6 @@ def exit_actor():
     if worker.mode == ray.WORKER_MODE and not worker.actor_id.is_nil():
         # Intentionally disconnect the core worker from the raylet so the
         # raylet won't push an error message to the driver.
-        worker.core_worker.disconnect()
         ray.disconnect()
         # Disconnect global state from GCS.
         ray.state.state.disconnect()

python/ray/includes/libcoreworker.pxd

@@ -81,7 +81,6 @@ cdef extern from "ray/core_worker/core_worker.h" nogil:
                         c_vector[shared_ptr[CRayObject]] *returns) nogil,
                     CRayStatus() nogil,
                     c_bool ref_counting_enabled)
-        void Disconnect()
         CWorkerType &GetWorkerType()
         CLanguage &GetLanguage()