MAINTAINERS: brcm80211: remove Infineon maintainers

These email addresses no longer work, so remove them from MAINTAINERS.
Signed-off-by: Double Lo <Double.Lo@infineon.com>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/20220222015947.169224-1-double.lo@infineon.com

MAINTAINERS

@@ -3817,9 +3817,6 @@ BROADCOM BRCM80211 IEEE802.11n WIRELESS DRIVER
 M:	Arend van Spriel <aspriel@gmail.com>
 M:	Franky Lin <franky.lin@broadcom.com>
 M:	Hante Meuleman <hante.meuleman@broadcom.com>
-M:	Chi-hsien Lin <chi-hsien.lin@infineon.com>
-M:	Wright Feng <wright.feng@infineon.com>
-M:	Chung-hsien Hsu <chung-hsien.hsu@infineon.com>
 L:	linux-wireless@vger.kernel.org
 L:	brcm80211-dev-list.pdl@broadcom.com
 L:	SHA-cyfmac-dev-list@infineon.com