net: remove [email protected] from MAINTAINERS

Our corporate overlords have been changing the domains around
again and this mailing list has gone away.

Signed-off-by: Shannon Nelson <[email protected]>
Reviewed-by: Martin Habets <[email protected]>
Signed-off-by: David S. Miller <[email protected]>

Author: emusln

MAINTAINERS

@@ -17532,7 +17532,6 @@ F:	include/linux/peci.h
 PENSANDO ETHERNET DRIVERS
 M:	Shannon Nelson <[email protected]>
 M:	Brett Creeley <[email protected]>
-M:	[email protected]
 L:	[email protected]
 S:	Supported
 F:	Documentation/networking/device_drivers/ethernet/pensando/ionic.rst