reuse make target for board list

scripts/boards.sh

@@ -1,16 +0,0 @@
-#!/usr/bin/env bash
-# SPDX-License-Identifier: GPL-3.0-only
-
-set -eE
-EXCLUDED_BOARDS=(
-    "system76/common"
-    "arduino/uno"
-    "arduino/micro"
-)
-
-BOARDS=$(find src/board -type d -maxdepth 2 -mindepth 2 2>/dev/null \
-  | grep -vFf <(printf '%s\n' "${EXCLUDED_BOARDS[@]}") \
-  | jq -sRc 'split("\n")[:-1] | map(split("/")) | map({vendor: .[2], board: .[3]})'
-)
-
-echo "boards=${BOARDS}"