diff --git a/colossalai/communication/p2p_v2.py b/colossalai/communication/p2p_v2.py
index 9b96d622f539..0b575e7dba77 100644
--- a/colossalai/communication/p2p_v2.py
+++ b/colossalai/communication/p2p_v2.py
@@ -266,43 +266,3 @@ def send_backward(input_object: Any, prev_rank: int = None) -> None:
         if prev_rank is None:
             prev_rank = gpc.get_prev_global_rank(ParallelMode.PIPELINE)
         _send_object(input_object, prev_rank)
-
-
-def send_forward_recv_backward():
-    """reserve
-    """
-    pass
-
-
-def send_backward_recv_forward():
-    """reserve
-    """
-    pass
-
-
-def send_forward_recv_forward():
-    """reserve
-    """
-    pass
-
-
-def send_backward_recv_backward():
-    """reserve
-    """
-    pass
-
-
-def send_forward_backward_recv_forward_backward(
-        output_tensor,
-        input_tensor_grad,
-        input_tensor_shape,
-        output_grad_shape,
-        recv_prev=True,
-        recv_next=True,
-        prev_rank=None,
-        next_rank=None,
-        dtype=torch.float,
-        scatter_gather_tensors=False) -> Tuple[Union[torch.Tensor, List[torch.Tensor]]]:
-    """reserve
-    """
-    pass