diff --git a/lib/matplotlib/projections/polar.py b/lib/matplotlib/projections/polar.py
index c78faf7f728a..0a4a7cbca03f 100644
--- a/lib/matplotlib/projections/polar.py
+++ b/lib/matplotlib/projections/polar.py
@@ -112,10 +112,6 @@ def get_matrix(self):
         return self._mtx
     get_matrix.__doc__ = Affine2DBase.get_matrix.__doc__
 
-    def __getstate__(self):
-        return {}
-
-
 class InvertedPolarTransform(Transform):
     """
     The inverse of the polar transform, mapping Cartesian