tty: serial: samsung: drop superfluous comment

The comment brings no benefit as we can already see from the method's
name, ``s3c24xx_serial_pm``, that it deals with power management.
Drop the superfluous comment.
Reviewed-by: Sam Protsenko <semen.protsenko@linaro.org>
Signed-off-by: Tudor Ambarus <tudor.ambarus@linaro.org>
Link: https://lore.kernel.org/r/20240119104526.1221243-12-tudor.ambarus@linaro.orgSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/tty/serial/samsung_tty.c

@@ -1295,8 +1295,6 @@ static int apple_s5l_serial_startup(struct uart_port *port)
 	return ret;
 }
 
-/* power power management control */
-
 static void s3c24xx_serial_pm(struct uart_port *port, unsigned int level,
 			      unsigned int old)
 {