Remove ipq40xx customization

6.1/target/linux/ipq40xx/base-files/lib/functions/board.sh

@@ -1,54 +0,0 @@
-
-. /usr/share/libubox/jshn.sh
-
-# when device contains 2 internal modems, this function will return '2' if
-#  selected modem(inc_id) is builtin and primary.
-# And if it's only builtin, then '1'
-is_builtin_modem() {
-	local inc_id="$1"
-	local modem modems id builtin primary
-
-	json_init
-	json_load_file "/etc/board.json"
-
-	json_get_keys modems modems
-	json_select modems
-
-	for modem in $modems; do
-		json_select "$modem"
-		json_get_vars id builtin primary
-
-		[ "$id" = "$inc_id" ] && {
-			[ -n "$builtin" ] && {
-				[ -n "$primary" ] && {
-					echo 2
-					return
-				}
-
-				echo 1
-				return
-			}
-
-			echo 0
-			return
-		}
-
-		json_select ..
-	done
-
-	echo 0
-}
-
-is_dual_modem() {
-	json_init
-	json_load_file "/etc/board.json"
-
-	json_get_keys hwinfo hwinfo
-	json_select hwinfo
-
-	json_get_vars dual_modem
-
-	[ "$dual_modem" = "1" ] && echo 1 || echo 0
-
-	json_select ..
-}