tests/docker: drop CentOS 7 container

It has been over two years since RHEL-8 was released, and thus per the
platform build policy, we no longer need to support RHEL-7 as a build
target.

Reviewed-by: Thomas Huth <thuth@redhat.com>
Acked-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Willian Rampazzo <willianr@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Message-Id: <20210514120415.1368922-10-berrange@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>

.gitlab-ci.d/containers.yml

@@ -7,11 +7,6 @@ amd64-alpine-container:
   variables:
     NAME: alpine
 
-amd64-centos7-container:
-  extends: .container_job_template
-  variables:
-    NAME: centos7
-
 amd64-debian11-container:
   extends: .container_job_template
   variables:

tests/docker/dockerfiles/centos7.docker

@@ -1,43 +0,0 @@
-FROM centos:7
-RUN yum install -y epel-release centos-release-xen-48
-
-RUN yum -y update
-
-# Please keep this list sorted alphabetically
-ENV PACKAGES \
-    bzip2 \
-    bzip2-devel \
-    ccache \
-    csnappy-devel \
-    dbus-daemon \
-    gcc-c++ \
-    gcc \
-    gettext \
-    git \
-    glib2-devel \
-    glibc-static \
-    gnutls-devel \
-    libaio-devel \
-    libepoxy-devel \
-    libfdt-devel \
-    libgcrypt-devel \
-    librdmacm-devel \
-    libzstd-devel \
-    lzo-devel \
-    make \
-    mesa-libEGL-devel \
-    mesa-libgbm-devel \
-    nettle-devel \
-    ninja-build \
-    perl-Test-Harness \
-    pixman-devel \
-    python3 \
-    SDL2-devel \
-    spice-glib-devel \
-    spice-server-devel \
-    tar \
-    vte-devel \
-    xen-devel \
-    zlib-devel
-RUN yum install -y $PACKAGES
-RUN rpm -q $PACKAGES | sort > /packages.txt