fix: remove commented-out line

Author: gvwilson

plotly/basedatatypes.py

@@ -473,7 +473,6 @@ class is a subclass of both BaseFigure and widgets.DOMWidget.
         DataValidator = ValidatorCache.get_validator("", "data")
         FramesValidator = ValidatorCache.get_validator("", "frames")
         LayoutValidator = ValidatorCache.get_validator("", "layout")
-        # from .validators import DataValidator, LayoutValidator, FramesValidator
 
         super(BaseFigure, self).__init__()