Remove redundant `break` in the for loop

Remove redundant `break` in the for loop of python script. When the `return` is triggered, the for loop will break automatically.

PS: really like your work! Thanks a lot 😄 .

problems/0242.有效的字母异位词.md

@@ -125,8 +125,6 @@ class Solution:
             if record[i] != 0:
                 #record数组如果有的元素不为零0，说明字符串s和t 一定是谁多了字符或者谁少了字符。
                 return False
-                #如果有一个元素不为零，则可以判断字符串s和t不是字母异位词
-                break
         return True
 ```