Remove unused variable

Signed-off-by: Jianhui Zhao <zhaojh329@gmail.com>

src/main.c

@@ -89,8 +89,7 @@ int main(int argc, char **argv)
         .host = "localhost",
         .port = 5912,
         .loop = loop,
-        .sock = -1,
-        .sock_file = -1
+        .sock = -1
     };
     int option_index;
     int c;

src/rtty.c

@@ -231,14 +231,8 @@ static void rtty_exit(struct rtty *rtty)
     close(rtty->sock);
     rtty->sock = -1;
 
-    if (rtty->sock_file > -1) {
-        close(rtty->sock_file);
-        rtty->sock_file = -1;
-    }
-
     ev_io_stop(rtty->loop, &rtty->ior);
     ev_io_stop(rtty->loop, &rtty->iow);
-    ev_io_stop(rtty->loop, &rtty->iof);
 
     buffer_free(&rtty->rb);
     buffer_free(&rtty->wb);

src/rtty.h

@@ -62,7 +62,6 @@ struct rtty {
     const char *host;
     int port;
     int sock;
-    int sock_file;
     const char *devid;
     const char *token;        /* authorization token */
     const char *description;
@@ -72,7 +71,6 @@ struct rtty {
     struct buffer wb;
     struct ev_io iow;
     struct ev_io ior;
-    struct ev_io iof;
     struct ev_timer tmr;
     struct ev_loop *loop;
     ev_tstamp active;