cleanup

yt/geometry/coordinates/spec_cube_coordinates.py

@@ -25,23 +25,6 @@ def __init__(self, ds, ordering=None):
             )
         super().__init__(ds, ordering)
 
-        # TODO(4179): migrate this
-        names = {}
-        if ds.lon_name != "X" or ds.lat_name != "Y":
-            names["x"] = r"Image\ x"
-            names["y"] = r"Image\ y"
-        names["z"] = ds.spec_name
-
-        self._image_axis_name = ian = {}  # deprecated
-        for ax in "xyz":
-            axi = self.axis_id[ax]
-            xax = self.axis_name[self.x_axis[ax]]
-            yax = self.axis_name[self.y_axis[ax]]
-            ian[axi] = ian[ax] = ian[ax.upper()] = (
-                names.get(xax, xax),
-                names.get(yax, yax),
-            )
-
         def _spec_axis(ax, x, y):
             p = (x, y)[ax]
             return [self.ds.pixel2spec(pp).v for pp in p]