FIX: remove LinearTransform

jklymak · jklymak · commit 713e67576e6a · 2021-01-08T08:36:59.000-08:00
diff --git a/lib/matplotlib/scale.py b/lib/matplotlib/scale.py
@@ -90,10 +90,6 @@ def __deepcopy__(self, memo):
     __copy__ = __deepcopy__
 
 
-class LinearTransform(_CopyableTransformMixin, IdentityTransform):
-    pass
-
-
 class LinearScale(ScaleBase):
     """
     The default linear scale.
@@ -125,7 +121,7 @@ def get_transform(self):
         Return the transform for linear scaling, which is just the
         `~matplotlib.transforms.IdentityTransform`.
         """
-        return LinearTransform()
+        return IdentityTransform()
 
 
 class FuncTransform(_CopyableTransformMixin, Transform):
diff --git a/lib/matplotlib/transforms.py b/lib/matplotlib/transforms.py
@@ -2062,6 +2062,14 @@ def frozen(self):
         # docstring inherited
         return self
 
+    def __deepcopy__(self, memo):
+        """
+        The identity transform does not need to lock out deepcopy
+        """
+        return self.frozen()
+
+    __copy__ = __deepcopy__
+
     __str__ = _make_str_method()
 
     def get_matrix(self):
