Revert "[API Compatibility] paddle.sigmoid sink into C++ "

paddle/phi/ops/yaml/ops.yaml

@@ -4968,10 +4968,6 @@
 
 - op : sigmoid
   args : (Tensor x)
-  python_api:
-    name : [paddle.sigmoid,paddle.Tensor.sigmoid,paddle.nn.functional.sigmoid]
-    args_alias:
-      use_default_mapping : True
   output : Tensor
   infer_meta :
     func : UnchangedInferMeta

python/paddle/_paddle_docs.py

@@ -590,47 +590,6 @@ def any(
 
 # shenwei
 
-add_doc_and_signature(
-    "sigmoid",
-    r"""
-    Sigmoid Activation.
-
-    .. math::
-       out = \\frac{1}{1 + e^{-x}}
-
-    Args:
-        x (Tensor): Input of Sigmoid operator, an N-D Tensor, with data type bfloat16, float16, float32, float64,
-            uint8, int8, int16, int32, int64, complex64 or complex128.
-        name (str|None, optional): Name for the operation (optional, default is None). For more information, please refer to :ref:`api_guide_Name`.
-    Keyword Args:
-        out (Tensor|optional): The output tensor.
-
-    Returns:
-        Tensor. Output of Sigmoid operator, a Tensor with shape same as input
-            (integer types are autocasted into float32).
-
-    Examples:
-        .. code-block:: python
-
-            >>> import paddle
-            >>> import paddle.nn.functional as F
-
-            >>> x = paddle.to_tensor([-0.4, -0.2, 0.1, 0.3])
-            >>> out = F.sigmoid(x)
-            >>> print(out)
-            Tensor(shape=[4], dtype=float32, place=Place(cpu), stop_gradient=True,
-            [0.40131235, 0.45016602, 0.52497917, 0.57444251])
-    """,
-    """
-    def sigmoid(
-        x: paddle.Tensor,
-        name: str | None = None,
-        *,
-        out: Tensor | None = None,
-    ) -> paddle.Tensor
-    """,
-)
-
 # zhouxin
 
 # hehongyu