[fixup] Remove repr from the base class

python/dune/codegen/sumfact/symbolic.py

@@ -214,9 +214,6 @@ class SumfactKernelInterfaceBase(object):
     def function_name_suffix(self):
         return ""
 
-    def __repr__(self):
-        return "SumfactKernelInterfaceBase()"
-
 
 class VectorSumfactKernelInput(SumfactKernelInterfaceBase):
     def __init__(self, interfaces):