[Placement Group] Remove useless placement group argument in ray remote (#11389)

* remove useless placement_group argument in @ray_remote

* remove

python/ray/remote_function.py

@@ -65,9 +65,7 @@ class RemoteFunction:
 
     def __init__(self, language, function, function_descriptor, num_cpus,
                  num_gpus, memory, object_store_memory, resources,
-                 accelerator_type, num_returns, max_calls, max_retries,
-                 placement_group, placement_group_bundle_index,
-                 placement_group_capture_child_tasks):
+                 accelerator_type, num_returns, max_calls, max_retries):
         self._language = language
         self._function = function
         self._function_name = (

python/ray/worker.py

@@ -1681,10 +1681,7 @@ def make_decorator(num_returns=None,
                    max_retries=None,
                    max_restarts=None,
                    max_task_retries=None,
-                   worker=None,
-                   placement_group=None,
-                   placement_group_bundle_index=-1,
-                   placement_group_capture_child_tasks=True):
+                   worker=None):
     def decorator(function_or_class):
         if (inspect.isfunction(function_or_class)
                 or is_cython(function_or_class)):
@@ -1713,9 +1710,7 @@ def make_decorator(num_returns=None,
             return ray.remote_function.RemoteFunction(
                 Language.PYTHON, function_or_class, None, num_cpus, num_gpus,
                 memory, object_store_memory, resources, accelerator_type,
-                num_returns, max_calls, max_retries, placement_group,
-                placement_group_bundle_index,
-                placement_group_capture_child_tasks)
+                num_returns, max_calls, max_retries)
 
         if inspect.isclass(function_or_class):
             if num_returns is not None:
@@ -1839,15 +1834,6 @@ def remote(*args, **kwargs):
             crashes unexpectedly. The minimum valid value is 0,
             the default is 4 (default), and a value of -1 indicates
             infinite retries.
-        placement_group (:obj:`PlacementGroup`): The placement group
-            this task belongs to, or ``None`` if it doesn't belong
-            to any group.
-        placement_group_bundle_index (int): The index of the bundle
-            if the task belongs to a placement group, which may be
-            -1 to indicate any available bundle.
-        placement_group_capture_child_tasks (bool): Default True.
-            If True, all the child tasks (including actor creation)
-            are scheduled in the same placement group.
 
     """
     worker = global_worker
@@ -1879,9 +1865,6 @@ def remote(*args, **kwargs):
             "max_restarts",
             "max_task_retries",
             "max_retries",
-            "placement_group",
-            "placement_group_bundle_index",
-            "placement_group_capture_child_tasks",
         ], error_string
 
     num_cpus = kwargs["num_cpus"] if "num_cpus" in kwargs else None