remove fedora-23 because eol

Signed-off-by: Andrew Hsu <andrewhsu@docker.com>
(cherry picked from commit ef98091a90)
Signed-off-by: Victor Vieux <vieux@docker.com>

CHANGELOG.md

@@ -218,6 +218,7 @@ To manually remove all plugins and resolve this problem, take the following step
 - Deprecate unversioned API endpoints [#28208](https://github.com/docker/docker/pull/28208)
 - Remove Ubuntu 15.10 (Wily Werewolf) as supported platform. Ubuntu 15.10 is EOL, and no longer receives updates [#27042](https://github.com/docker/docker/pull/27042)
 - Remove Fedora 22 as supported platform. Fedora 22 is EOL, and no longer receives updates [#27432](https://github.com/docker/docker/pull/27432)
+- Remove Fedora 23 as supported platform. Fedora 23 is EOL, and no longer receives updates [#29455](https://github.com/docker/docker/pull/29455)
 - Deprecate the `repo:shortid` syntax on `docker pull` [#27207](https://github.com/docker/docker/pull/27207)
 - Deprecate backing filesystem without `d_type` for overlay and overlay2 storage drivers [#27433](https://github.com/docker/docker/pull/27433)
 - Deprecate `MAINTAINER` in Dockerfile [#25466](https://github.com/docker/docker/pull/25466)

contrib/builder/rpm/amd64/fedora-23/Dockerfile

@@ -1,19 +0,0 @@
-#
-# THIS FILE IS AUTOGENERATED; SEE "contrib/builder/rpm/amd64/generate.sh"!
-#
-
-FROM fedora:23
-
-RUN dnf -y upgrade
-RUN dnf install -y @development-tools fedora-packager
-RUN dnf install -y btrfs-progs-devel device-mapper-devel glibc-static libseccomp-devel libselinux-devel libtool-ltdl-devel pkgconfig selinux-policy selinux-policy-devel sqlite-devel systemd-devel tar git cmake vim-common
-
-ENV GO_VERSION 1.7.3
-RUN curl -fSL "https://golang.org/dl/go${GO_VERSION}.linux-amd64.tar.gz" | tar xzC /usr/local
-ENV PATH $PATH:/usr/local/go/bin
-
-ENV AUTO_GOPATH 1
-
-ENV DOCKER_BUILDTAGS pkcs11 seccomp selinux
-ENV RUNC_BUILDTAGS seccomp selinux
-

contrib/builder/rpm/amd64/generate.sh

@@ -4,8 +4,8 @@ set -e
 # usage: ./generate.sh [versions]
 #    ie: ./generate.sh
 #        to update all Dockerfiles in this directory
-#    or: ./generate.sh
-#        to only update fedora-23/Dockerfile
+#    or: ./generate.sh centos-7
+#        to only update centos-7/Dockerfile
 #    or: ./generate.sh fedora-newversion
 #        to create a new folder and a Dockerfile within it