remove old commented out print statement

bilby/core/prior/dict.py

@@ -416,7 +416,6 @@ class PriorDict(dict):
                            for key in sample], **kwargs)
 
         ratio = self.normalize_constraint_factor(tuple(sample.keys()))
-        #print("ratio = {}".format(ratio))
         if np.all(prob == 0.):
             return prob
         else: