hack: remove containerutility script

this script is not used anymore. containerutility is
built in the Dockerfile.

Signed-off-by: CrazyMax <crazy-max@users.noreply.github.com>
(cherry picked from commit 04c90b8cf5c624072c8e74f66899e440875ef422)

hack/make/containerutility

@@ -1,20 +0,0 @@
-#!/usr/bin/env bash
-set -e
-
-: "${CONTAINER_UTILITY_COMMIT:=aa1ba87e99b68e0113bd27ec26c60b88f9d4ccd9}"
-
-(
-	git clone https://github.com/docker/windows-container-utility.git "$GOPATH/src/github.com/docker/windows-container-utility"
-	cd "$GOPATH/src/github.com/docker/windows-container-utility"
-	git checkout -q "$CONTAINER_UTILITY_COMMIT"
-
-	echo Building: ${DEST}/containerutility.exe
-
-	(
-		make
-	)
-
-	mkdir -p ${ABS_DEST}
-
-	cp containerutility.exe ${ABS_DEST}/containerutility.exe
-)