serial: icom: delete empty serial hooks

uart_ops::release_port() and uart_ops::request_port() are not required
by the serial layer. So no need to define empty ones.

Remove them.
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Link: https://lore.kernel.org/r/20220421085808.24152-10-jslaby@suse.czSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/tty/serial/icom.c

@@ -1532,15 +1532,6 @@ static const char *icom_type(struct uart_port *port)
 	return "icom";
 }
 
-static void icom_release_port(struct uart_port *port)
-{
-}
-
-static int icom_request_port(struct uart_port *port)
-{
-	return 0;
-}
-
 static void icom_config_port(struct uart_port *port, int flags)
 {
 	port->type = PORT_ICOM;
@@ -1559,8 +1550,6 @@ static const struct uart_ops icom_ops = {
 	.shutdown = icom_close,
 	.set_termios = icom_set_termios,
 	.type = icom_type,
-	.release_port = icom_release_port,
-	.request_port = icom_request_port,
 	.config_port = icom_config_port,
 };