Remove LCOW

It is now under https://github.com/linuxkit/lcow

Signed-off-by: Rolf Neugebauer <rolf.neugebauer@docker.com>

test/cases/000_build/200_blueprints/020_lcow/test.sh

@@ -1,26 +0,0 @@
-#!/bin/sh
-# SUMMARY: Test the build of LCOW blueprint
-# LABELS:
-
-set -e
-
-# Source libraries. Uncomment if needed/defined
-#. "${RT_LIB}"
-. "${RT_PROJECT_ROOT}/_lib/lib.sh"
-
-NAME=lcow
-
-clean_up() {
-	rm -f ${NAME}-*
-}
-
-trap clean_up EXIT
-
-# Test code goes here
-moby build -format kernel+initrd -name "${NAME}" "${LINUXKIT_BLUEPRINTS_DIR}/lcow.yml" 
-[ -f "${NAME}-kernel" ] || exit 1
-[ -f "${NAME}-initrd.img" ] || exit 1
-[ -f "${NAME}-cmdline" ] || exit 1
-
-exit 0
-