fix: remove commented code

Author: jonathanedey

firebase_admin/ml.py

@@ -732,9 +732,6 @@ def __next__(self):
             return result
         raise StopIteration
 
-    # def __next__(self):
-    #     return self.next()
-
     def __iter__(self):
         return self
 

firebase_admin/tenant_mgt.py

@@ -428,9 +428,6 @@ def __next__(self):
             return result
         raise StopIteration
 
-    # def __next__(self):
-    #     return self.next()
-
     def __iter__(self):
         return self