[Finsh] cleanup the code style

components/finsh/shell.c

@@ -35,7 +35,6 @@
  *                             initialization when use GNU GCC compiler.
  */
 
-#include <rtthread.h>
 #include <rthw.h>
 
 #include "finsh.h"
@@ -653,8 +652,6 @@ int finsh_system_init(void)
     shell = &_shell;
 #endif
 
-	rt_kprintf("shell tcb size: %d\n", sizeof(struct finsh_shell));
-
     memset(shell, 0, sizeof(struct finsh_shell));
 
     rt_sem_init(&(shell->rx_sem), "shrx", 0, 0);