Remove incorrect comment.

sql/mysqld.cc

@@ -5397,7 +5397,7 @@ int mysqld_main(int argc, char **argv)
 #ifdef WITH_PERFSCHEMA_STORAGE_ENGINE
   pre_initialize_performance_schema();
 #endif /*WITH_PERFSCHEMA_STORAGE_ENGINE */
-  // For windows, my_init() is called from the win specific mysqld_main
+
   if (my_init())                 // init my_sys library & pthreads
   {
     fprintf(stderr, "my_init() failed.");