lib.sh: remove badcmd()

it's bloat. telling the user to rtfm is something that
we already do on irc; they will still ask how to do
everything, and ignore the message from badcmd(), or
they will automatically know to rtfm.

i'm on a massive purge, removing bloat from lbmk as
part of Libreboot Build System Audit 6.

all bloat must go.

Signed-off-by: Leah Rowe <leah@libreboot.org>

script/roms

@@ -33,8 +33,9 @@ main()
 {
 	while [ $# -gt 0 ]; do
 		if [ "$1" = "serprog" ]; then
-			[ $# -lt 2 ] && badcmd "serprog type not set"
-			[ "$2" != "rp2040" ] && [ "$2" != "stm32" ] && badcmd
+			[ $# -lt 2 ] && $err "serprog type not set"
+			[ "$2" != "rp2040" ] && [ "$2" != "stm32" ] && \
+			    $err "invalid serprog type"
 			eval "x_ ./update trees -f \"\${${2}src##*/}\""
 			ser="$2" && shift 2 && continue
 		fi

script/trees

@@ -28,7 +28,7 @@ main()
 		-s) mode="savedefconfig" ;;
 		-l) mode="olddefconfig" ;;
 		-n) mode="nconfig" ;;
-		*) badcmd "invalid option '-$option'" ;;
+		*) $err "invalid option '-$option'" ;;
 		esac
 		shift; project="${OPTARG#src/}"; shift
 	done