Stop reffering to tests repo for ansible requirements

With molecule implementation we've added ansible-core requirement
to the integrated repo, so we no longer need to rely on test repo.

Change-Id: Id512aef29eceb4a2bc1c035a73dfc0cd5506f0d6

tox.ini

@@ -96,20 +96,11 @@ ignore=F403,E124,W503
 commands =
     bash -c "{toxinidir}/tests/common/test-bashate.sh"
 
-# The deps URL should be set to the appropriate git URL.
-# In the tests repo itself, the variable is uniquely set to
-# the toxinidir so that the role is able to test itself, but
-# the tox config is exactly the same as other repositories.
-#
-# The value for other repositories must be:
-# https://opendev.org/openstack/openstack-ansible-tests/raw/test-ansible-deps.txt
-# or for a stable branch:
-# https://opendev.org/openstack/openstack-ansible-tests/raw/stable/stein/test-ansible-deps.txt
+
 [testenv:ansible]
 deps =
     {[testenv]deps}
     -r{toxinidir}/global-requirement-pins.txt
-    -rhttps://opendev.org/openstack/openstack-ansible-tests/raw/test-ansible-deps.txt
 
 [testenv:ansible-syntax]
 deps =