Remove curve default and trc param from Placebo

vskernels/kernels/placebo.py

@@ -55,20 +55,7 @@ def __init__(
         self.blur = blur
         self.taper = taper
         self.antiring = antiring
-        super().__init__(**(dict(curve=Transfer.BT709) | kwargs))
-
-    @inject_self.cached
-    @inject_kwargs_params
-    def scale(  # type: ignore[override]
-        self, clip: vs.VideoNode, width: int | None = None, height: int | None = None,
-        shift: tuple[TopShift, LeftShift] = (0, 0), *,
-        linear: bool = True, sigmoid: bool | tuple[Slope, Center] = True, curve: TransferT | None = None, **kwargs: Any
-    ) -> vs.VideoNode:
-        width, height = self._wh_norm(clip, width, height)
-        return super().scale(
-            clip, width, height, shift, linear=linear, sigmoid=sigmoid,
-            trc=Transfer.from_param_or_video(curve, clip).value_libplacebo
-        )
+        super().__init__(**kwargs)
 
     @inject_kwargs_params
     def get_scale_args(