Merge pull request #2537 from lymzzyh/finsh

[components][finsh][shell]remove finsh get char error print

components/finsh/shell.c

@@ -297,7 +297,6 @@ static void finsh_wait_auth(void)
                 ch = finsh_getchar();
                 if (ch < 0)
                 {
-                    rt_kprintf("finsh getchar error\n");
                     continue;
                 }
 
@@ -510,7 +509,6 @@ void finsh_thread_entry(void *parameter)
         ch = finsh_getchar();
         if (ch < 0)
         {
-            rt_kprintf("finsh getchar error\n");
             continue;
         }