Revert "测试回滚提交"

This reverts commit 3b727f6c92.

hello.c

@@ -9,6 +9,5 @@ void main()
     printf("nihao\n");
     printf("你好\n");
     printf("haode\n");
-    printf("测试回滚提交\n");
     return 0;    
 }