tools: Remove toybox. It's no longer used by any active packages

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

tools/toybox-media/Dockerfile

@@ -1,24 +0,0 @@
-FROM linuxkit/alpine:c5021a113803f7608e3908014d316c3490183d0b@sha256:4c7a80173c71ca5019dc56f40442b3a8345f141dd46593bd1fe6d130294d07cb AS build
-RUN apk add \
-    bash \
-    gcc \
-    git \
-    make \
-    musl-dev
-
-ENV FILES="ls tar sh find sha1sum"
-# 0.7.2
-ENV LDFLAGS=--static
-RUN git clone https://github.com/landley/toybox.git && \
-  cd toybox && git checkout b27d5d9ad0c56014d8661d91f69ee498bbbe4cf9
-WORKDIR /toybox
-RUN make defconfig
-RUN make ${FILES}
-RUN mkdir -p /out/bin
-RUN cp ${FILES} /out/bin
-
-FROM scratch
-ENTRYPOINT []
-CMD []
-WORKDIR /
-COPY --from=build out/bin bin/

tools/toybox-media/Makefile

@@ -1,14 +0,0 @@
-.PHONY: tag push
-default: push
-
-IMAGE=toybox-media
-DEPS=Dockerfile
-
-HASH?=$(shell git ls-tree HEAD -- ../$(notdir $(CURDIR)) | awk '{print $$3}')
-
-tag: $(DEPS)
-	docker build --no-cache -t linuxkit/$(IMAGE):$(HASH) .
-
-push: tag
-	DOCKER_CONTENT_TRUST=1 docker pull linuxkit/$(IMAGE):$(HASH) || \
-	DOCKER_CONTENT_TRUST=1 docker push linuxkit/$(IMAGE):$(HASH)

tools/toybox-media/README.md

@@ -1,3 +0,0 @@
-`linuxkit/toybox-media` is a small container image, which can be use
-to distribute other files in. It contains a basic shell, `tar`, `ls`,
-`find`, and `sha1sum`. It's compiled from [toybox](https://github.com/landley/toybox.git).