board: ls1046ardb: Update MAINTAINERS

Update LS1046ARDB BOARD MAINTAINERS entries to
current MAINTAINERS.

Signed-off-by: Priyanka Jain <priyanka.jain@nxp.com>

board/freescale/ls1046ardb/MAINTAINERS

@@ -11,13 +11,6 @@ F:	configs/ls1046ardb_sdcard_defconfig
 F:	configs/ls1046ardb_emmc_defconfig
 F:	configs/ls1046ardb_tfa_defconfig
 F:	configs/ls1046ardb_tfa_SECURE_BOOT_defconfig
-
-LS1046A_SECURE_BOOT BOARD
-M:	Ruchika Gupta <ruchika.gupta@nxp.com>
-S:	Maintained
 F:	configs/ls1046ardb_SECURE_BOOT_defconfig
 F:	configs/ls1046ardb_sdcard_SECURE_BOOT_defconfig
-
-M:	Sumit Garg <sumit.garg@nxp.com>
-S:	Maintained
 F:	configs/ls1046ardb_qspi_SECURE_BOOT_defconfig