Remove the manual patch for WSME

WSME was released. Therefore, we can remove this work around.

Change-Id: I1673258da4fa9bcd96db24d635d9f06e3fc4a6a2

tox.ini

@@ -16,12 +16,6 @@ deps = -c{env:TOX_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/up
        -r{toxinidir}/requirements.txt
        -r{toxinidir}/test-requirements.txt
 
-commands_pre =
-  # We need the patch https://review.opendev.org/c/openstack/cloudkitty/+/861786;
-  # therefore, until it is released a new version of WSME, we will need to manually
-  # install WSME with `tox`.
-  pip install git+https://opendev.org/x/wsme@a45e0af97e2e8362277f160d0f2b737590e367d1
-
 commands =
   find . -type f -name "*.py[co]" -delete
   rm -f .testrepository/times.dbm