release: remove cri-containerd-*.tar.gz release bundles

The `cri-containerd-*.tar.gz` release bundles have been deprecated
since containerd v1.6.

These bundles are no longer created in the CI, however, the
corresponding Makefile targets are still kept, as they are still used by
external CIs.

Signed-off-by: Akihiro Suda <akihiro.suda.cz@hco.ntt.co.jp>

.github/workflows/release/Dockerfile

@@ -27,7 +27,8 @@ ENV DEBIAN_FRONTEND=noninteractive
 RUN	apt-get update && \
 	apt-get install -y dpkg-dev git make pkg-config
 ARG TARGETPLATFORM
-RUN xx-apt-get install -y libseccomp-dev btrfs-progs gcc
+# gcc is needed for github.com/containerd/btrfs/v2
+RUN xx-apt-get install -y gcc
 ENV PATH=/usr/local/go/bin:$PATH
 ENV GOPATH=/go
 ENV CGO_ENABLED=1
@@ -49,7 +50,7 @@ RUN \
 	--mount=type=cache,target=/root/.cache/go-build \
 	--mount=type=cache,target=/go/pkg \
 	export CC=$(xx-info)-gcc && xx-go --wrap && \
-	make release static-release cri-release cri-cni-release && \
+	make release static-release && \
 	for f in $(find bin -executable -type f); do xx-verify $f; done
 
 # check git working tree after build