MAINTAINERS: amd: drop inactive Brijesh Singh

Emails to Brijesh Singh bounce ("550 5.1.10
RESOLVER.ADR.RecipientNotFound; Recipient not found by SMTP address
lookup").
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Acked-by: Tom Lendacky <thomas.lendacky@amd.com>
Link: https://lore.kernel.org/r/20230127105935.99174-1-krzysztof.kozlowski@linaro.orgSigned-off-by: Arnd Bergmann <arnd@arndb.de>

MAINTAINERS

@@ -1097,7 +1097,6 @@ S:	Maintained
 F:	drivers/dma/ptdma/
 
 AMD SEATTLE DEVICE TREE SUPPORT
-M:	Brijesh Singh <brijeshkumar.singh@amd.com>
 M:	Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
 M:	Tom Lendacky <thomas.lendacky@amd.com>
 S:	Supported