Removed the unused eos.repo file

continuousintegration/docker/buildtree_runner/cc7/etc/yum.repos.d/eos.repo

-[eos-citrine]
-name=EOS Citrine
-baseurl=http://dss-ci-repo.web.cern.ch/dss-ci-repo/eos/citrine/tag/el-7/x86_64/
-gpgcheck=0
-priority=4
-enabled=0
-
-[eos-citrine-commit]
-name=EOS Citrine commit repo
-baseurl=http://dss-ci-repo.web.cern.ch/dss-ci-repo/eos/citrine/commit/el-7/x86_64/
-gpgcheck=0
-priority=4
-enabled=1
-
-[eos-citrine-depend]
-name=EOS Citrine
-baseurl=http://dss-ci-repo.web.cern.ch/dss-ci-repo/eos/citrine-depend/el-7-x86_64/
-gpgcheck=0
-priority=4
-enabled=1

continuousintegration/docker/ctafrontend/cc7/etc/yum.repos.d/eos.repo

-[eos-citrine]
-name=EOS Citrine
-baseurl=http://dss-ci-repo.web.cern.ch/dss-ci-repo/eos/citrine/tag/el-7/x86_64/
-gpgcheck=0
-priority=4
-enabled=0
-
-[eos-citrine-commit]
-name=EOS Citrine commit repo
-baseurl=http://dss-ci-repo.web.cern.ch/dss-ci-repo/eos/citrine/commit/el-7/x86_64/
-gpgcheck=0
-priority=4
-enabled=1
-
-[eos-citrine-depend]
-name=EOS Citrine
-baseurl=http://dss-ci-repo.web.cern.ch/dss-ci-repo/eos/citrine-depend/el-7-x86_64/
-gpgcheck=0
-priority=4
-enabled=1