MAINTAINERS: remove myself as iwlwifi driver maintainer

As I'm resigning from Intel, it's time to remove myself as a maintainer
of iwlwifi. Good luck to Miri!
Signed-off-by: Gregory Greenman <gregory.greenman@intel.com>
Link: https://msgid.link/20240102122019.1689602-1-gregory.greenman@intel.comSigned-off-by: Johannes Berg <johannes.berg@intel.com>

MAINTAINERS

@@ -11128,7 +11128,6 @@ S:	Supported
 F:	drivers/net/wireless/intel/iwlegacy/
 
 INTEL WIRELESS WIFI LINK (iwlwifi)
-M:	Gregory Greenman <gregory.greenman@intel.com>
 M:	Miri Korenblit <miriam.rachel.korenblit@intel.com>
 L:	linux-wireless@vger.kernel.org
 S:	Supported