message: Makefile: remove snapshotter's targets out
  Snapshotter has already migrated to containerd org.
diff: @@ -130,7 +130,7 @@ docker-nydusify-image-test: docker-static
  -e BACKEND_CONFIG=$(BACKEND_CONFIG) \
  -v $(current_dir):/nydus-rs $(dind_cache_mount) nydusify-smoke TestDockerHubImage
  -docker-smoke: docker-nydus-smoke docker-nydusify-smoke nydus-snapshotter
  +docker-smoke: docker-nydus-smoke docker-nydusify-smoke
  nydusify:
  $(call build_golang,${NYDUSIFY_PATH},make)
  @@ -141,16 +141,6 @@ nydusify-test:
  nydusify-static:
  $(call build_golang,${NYDUSIFY_PATH},make static-release)
  -SNAPSHOTTER_PATH = contrib/nydus-snapshotter
  -nydus-snapshotter:
  - $(call build_golang,${SNAPSHOTTER_PATH},make)
  -
  -nydus-snapshotter-test:
  - $(call build_golang,${SNAPSHOTTER_PATH},make test)
  -
  -nydus-snapshotter-static:
  - $(call build_golang,${SNAPSHOTTER_PATH},make static-release)
  -
  CTR-REMOTE_PATH = contrib/ctr-remote
  ctr-remote:
  $(call build_golang,${CTR-REMOTE_PATH},make)
  @@ -185,10 +175,10 @@ docker-nydus-graphdriver-static:
  # refer to `misc/example/README.md` for details.
  all-static-release: docker-static all-contrib-static-release
  -all-contrib-static-release: nydusify-static nydus-snapshotter-static ctr-remote-static \
  +all-contrib-static-release: nydusify-static ctr-remote-static \
  nydus-overlayfs-static docker-nydus-graphdriver-static
  -all-contrib-test: nydusify-test nydus-snapshotter-test ctr-remote-test \
  +all-contrib-test: nydusify-test ctr-remote-test \
  nydus-overlayfs-test docker-nydus-graphdriver-test
  # https://www.gnu.org/software/make/manual/html_node/One-Shell.html
  @@ -197,7 +187,6 @@ docker-example: all-static-release
  cp ${current_dir}/target-fusedev/${ARCH}-unknown-linux-musl/release/nydusd misc/example
  cp ${current_dir}/target-fusedev/${ARCH}-unknown-linux-musl/release/nydus-image misc/example
  cp contrib/nydusify/cmd/nydusify misc/example
  - cp contrib/nydus-snapshotter/bin/containerd-nydus-grpc misc/example
  docker build -t nydus-rs-example misc/example
  @cid=$(shell docker run --rm -t -d --privileged $(dind_cache_mount) nydus-rs-example)
  @docker exec $$cid /run.sh
  