MAINTAINERS: 8250: remove website reference

This website is obsolete, as it has not been updated in more than a decade.

Cc: "Theodore Ts'o" <tytso@mit.edu>
Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

MAINTAINERS

@@ -175,7 +175,6 @@ F:	drivers/net/ethernet/realtek/r8169.c
 8250/16?50 (AND CLONE UARTS) SERIAL DRIVER
 M:	Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 L:	linux-serial@vger.kernel.org
-W:	http://serial.sourceforge.net
 S:	Maintained
 T:	git git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty.git
 F:	drivers/tty/serial/8250*