Merge "tox: Drop envdir"

tox.ini

@@ -7,8 +7,6 @@ usedevelop = True
 passenv = ZUUL_CACHE_DIR
           REQUIREMENTS_PIP_LOCATION
 install_command = pip install {opts} {packages}
-setenv =
-   VIRTUAL_ENV={envdir}
 deps =
   -c{env:TOX_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/master}
   -r{toxinidir}/test-requirements.txt
@@ -49,7 +47,6 @@ commands = sphinx-build -W -b html doc/source doc/build/html
 
 [testenv:pdf-docs]
 basepython = python3
-envdir = {toxworkdir}/docs
 deps = {[testenv:docs]deps}
 allowlist_externals =
   rm