Update prompts.py

IPython/core/prompts.py

@@ -18,9 +18,6 b' class LazyEvaluate(object):'
 
     def __str__(self):
         return str(self())
-
-    def __unicode__(self):
-        return self.__str__()
-
+    
     def __format__(self, format_spec):
         return format(self(), format_spec)