Remove run-cover role

This doesn't appear to be used any place any more.

Change-Id: I64719f7199afb2bd06194f784c24eee9f21579bb
Signed-off-by: Paul Belanger <pabelanger@redhat.com>

roles/run-cover/defaults/main.yaml

@@ -1,3 +0,0 @@
----
-tox_environment: cover
-zuul_work_dir: "src/{{ zuul.project.canonical_name }}"

roles/run-cover/tasks/main.yaml

@@ -1,30 +0,0 @@
-- name: Run code coverage
-  args:
-    chdir: "{{ zuul_work_dir }}"
-  shell: |
-    #!/bin/bash -xe
-
-    # Run coverage via tox. Also, run pbr freeze on the
-    # resulting environment at the end so that we have a record of exactly
-    # what packages we ended up testing.
-
-    export NOSE_COVER_HTML=1
-    export UPPER_CONSTRAINTS_FILE=$(pwd)/upper-constraints.txt
-
-    venv={{ tox_environment }}
-
-    # Workaround the combo of tox running setup.py outside of virtualenv
-    # and RHEL having an old distribute. The next line can be removed
-    # when either get fixed.
-    python setup.py --version
-
-    tox -e$venv
-    result=$?
-    [ -e .tox/$venv/bin/pbr ] && freezecmd=pbr || freezecmd=pip
-
-    echo "Begin $freezecmd freeze output from test virtualenv:"
-    echo "======================================================================"
-    .tox/${venv}/bin/${freezecmd} freeze
-    echo "======================================================================"
-
-    exit $result