tty: pty: remove redundant initialization of variable fd

The variable fd is being initialized with a value that is never
read, it is being updated later on. The assignment is redundant and
can be removed.

Reviewed-by: Jiri Slaby <[e-mail]>
Signed-off-by: Colin Ian King <[e-mail]>
Addresses-Coverity: ("Unused value")
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/tty/pty.c

···
  */
 int ptm_open_peer(struct file *master, struct tty_struct *tty, int flags)
 {
-	int fd = -1;
+	int fd;
 	struct file *filp;
 	int retval = -EINVAL;
 	struct path path;