feat(mge/distributed): deprecate get_device_count_by_fork

GitOrigin-RevId: 6147c3ae905c65a532fe000aa51546abdfddc96f

imperative/python/megengine/distributed/helper.py

@@ -15,12 +15,12 @@ from weakref import WeakSet
 import numpy as np
 
 from megengine.autodiff.grad_manager import GradManager, get_backwarding_grad_manager
-from megengine.device import get_default_device, get_device_count
 
 from ..core._imperative_rt.core2 import apply
 from ..core.ops.builtin import ParamPackConcat, ParamPackSplit
 from ..functional.tensor import copy
 from ..tensor import Tensor
+from ..utils.deprecation import deprecated_func
 from ..utils.future import Future
 from . import group as _group
 from .functional import _bcast_param, all_reduce_sum, broadcast
@@ -193,6 +193,11 @@ def _check_device_initialized(device_type: str, rank: int):
         raise RuntimeError(errmsg)
 
 
+get_device_count_by_fork = deprecated_func(
+    "1.5", "megengine.device", "get_device_count", False
+)
+
+
 def bcast_list_(inps: list, group: Group = WORLD):
     """
     Broadcast tensors between given group.