MAINTAINERS: drop outdated I2C website

As stated on the website: "This wiki has been archived and the content
is no longer updated." No need to reference it.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>

Author: Wolfram Sang

MAINTAINERS

@@ -12009,7 +12009,6 @@ I2C SUBSYSTEM
 M:	Wolfram Sang <wsa+renesas@sang-engineering.com>
 L:	linux-i2c@vger.kernel.org
 S:	Maintained
-W:	https://i2c.wiki.kernel.org/
 Q:	https://patchwork.ozlabs.org/project/linux-i2c/list/
 T:	git git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux.git
 F:	Documentation/i2c/
@@ -12035,7 +12034,6 @@ I2C SUBSYSTEM HOST DRIVERS
 M:	Andi Shyti <andi.shyti@kernel.org>
 L:	linux-i2c@vger.kernel.org
 S:	Maintained
-W:	https://i2c.wiki.kernel.org/
 Q:	https://patchwork.ozlabs.org/project/linux-i2c/list/
 T:	git git://git.kernel.org/pub/scm/linux/kernel/git/andi.shyti/linux.git
 F:	Documentation/devicetree/bindings/i2c/