!574 [lwP] fix unused variable

Merge pull request !574 from bernard/bernard_rt-smart

components/lwp/lwp_pid.c

@@ -437,7 +437,6 @@ void lwp_free(struct rt_lwp* lwp)
     /* for parent */
     {
         struct termios *old_stdin_termios = get_old_termios();
-        struct rt_lwp *self_lwp = (struct rt_lwp *)lwp_self();
         struct rt_lwp *old_lwp = NULL;
 
         if (lwp->session == -1)

components/net/Kconfig

@@ -45,7 +45,6 @@ config RT_USING_SAL
             bool "Enable support AF_UNIX socket"
             default n
             default y if RT_USING_LWP
-            select LWIP_NETIF_LINK_CALLBACK
 
         if !SAL_USING_POSIX