Remove useless cover target

This repository contains code for testing and we have no real benefit
with code coverage.

Change-Id: Iaa1c4d77182e683b0f1f689f6492557e149239f3
Signed-off-by: Takashi Kajinami <kajinamit@oss.nttdata.com>
diff --git a/.coveragerc b/.coveragerc
deleted file mode 100644
index 5d5b32c..0000000
--- a/.coveragerc
+++ /dev/null
@@ -1,6 +0,0 @@
-[run]
-branch = True
-source = neutron_tempest_plugin
-
-[report]
-ignore_errors = True
diff --git a/test-requirements.txt b/test-requirements.txt
index 924f9ae..ee399b8 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -1,6 +1,5 @@
 hacking>=6.1.0,<6.2.0 # Apache-2.0
 
-coverage>=4.4.1 # Apache-2.0
 flake8-import-order>=0.18.0,<0.19.0 # LGPLv3
 oslotest>=3.2.0 # Apache-2.0
 stestr>=1.0.0 # Apache-2.0
diff --git a/tox.ini b/tox.ini
index 5f4d1e9..29be112 100644
--- a/tox.ini
+++ b/tox.ini
@@ -26,16 +26,6 @@
 [testenv:venv]
 commands = {posargs}
 
-[testenv:cover]
-setenv =
-    {[testenv]setenv}
-    PYTHON=coverage run --source neutron_tempest_plugin --parallel-mode
-commands =
-    stestr run --no-subunit-trace {posargs}
-    coverage combine
-    coverage html -d cover
-    coverage xml -o cover/coverage.xml
-
 [testenv:docs]
 deps = -c{env:TOX_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/master}
        -r{toxinidir}/requirements.txt