bpy.types.bpy_struct is still being considered a fake class in some places

[Mysteryem]

When fake classes added by pypredef_gen are inserted into the bases of a class, a "This class has a fake class added by pypredef_gen in its bases" message is added to that class' docstring. bpy_struct used to not be accessible from bpy.types (back when pypredef_gen was written), but is now accessible, so should not be considered a fake class and should not cause this addition to classes' docstrings.