release: remove arm/armv6 RPI-B configuration file

The arm/armv6 RPI-B images are deprecated in 15 and 14.
An MFC to stable/14 will follow.

MFC after:	3 days
Sponsored by:	GoFundMe https://www.gofundme.com/f/gjbbsd
Sponsored by:	PayPal https://paypal.me/gjbbsd

release/arm/RPI-B.conf

@@ -1,49 +0,0 @@
-#!/bin/sh
-#
-#
-
-EMBEDDED_TARGET_ARCH="armv6"
-EMBEDDED_TARGET="arm"
-EMBEDDEDBUILD=1
-EMBEDDEDPORTS="sysutils/u-boot-rpi sysutils/rpi-firmware"
-FAT_SIZE="50m"
-FAT_TYPE="16"
-IMAGE_SIZE="5120M"
-KERNEL="RPI-B"
-MD_ARGS="-x 63 -y 255"
-UBOOT_DIR="/usr/local/share/u-boot/u-boot-rpi"
-RPI_FIRMWARE_DIR="/usr/local/share/rpi-firmware"
-OL_DIR="${RPI_FIRMWARE_DIR}/overlays"
-OVERLAYS="mmc.dtbo disable-bt.dtbo"
-PART_SCHEME="MBR"
-export BOARDNAME="RPI-B"
-
-arm_install_uboot() {
-	UBOOT_FILES="u-boot.bin"
-	RPI_FIRMWARE_FILES="bootcode.bin config.txt \
-		fixup.dat fixup_cd.dat fixup_db.dat fixup_x.dat \
-		start.elf start_cd.elf start_db.elf start_x.elf \
-		bcm2708-rpi-zero-w.dtb bcm2708-rpi-b-plus.dtb \
-		bcm2708-rpi-b.dtb bcm2708-rpi-cm.dtb"
-	FATMOUNT="${DESTDIR%${KERNEL}}/fat"
-	chroot ${CHROOTDIR} mkdir -p "${FATMOUNT}"
-	chroot ${CHROOTDIR} mount_msdosfs /dev/${mddev}s1 ${FATMOUNT}
-	for _UF in ${UBOOT_FILES}; do
-		chroot ${CHROOTDIR} cp -p ${UBOOT_DIR}/${_UF} \
-			${FATMOUNT}/${_UF}
-	done
-	for _UF in ${RPI_FIRMWARE_FILES}; do
-		chroot ${CHROOTDIR} cp -p ${RPI_FIRMWARE_DIR}/${_UF} \
-			${FATMOUNT}/${_UF}
-	done
-	chroot ${CHROOTDIR} mkdir -p ${FATMOUNT}/overlays
-	for _OL in ${OVERLAYS}; do
-		chroot ${CHROOTDIR} cp -p ${OL_DIR}/${_OL} \
-			${FATMOUNT}/overlays/${_OL}
-	done
-	sync
-	umount_loop ${CHROOTDIR}/${FATMOUNT}
-	chroot ${CHROOTDIR} rmdir ${FATMOUNT}
-	
-	return 0
-}