Merge "Avoid empty dependencies in tox.ini"

tox.ini

@@ -12,6 +12,7 @@ setenv =
    PYTHONWARNINGS=default::DeprecationWarning
 deps =
   -c{env:TOX_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/master}
+  -r{toxinidir}/doc/requirements.txt
 
 [testenv:pep8]
 deps =
@@ -28,20 +29,16 @@ commands = {posargs}
 
 [testenv:docs]
 usedevelop = False
-deps = -c{env:TOX_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/master}
-       -r{toxinidir}/doc/requirements.txt
 commands = sphinx-build -W -b html doc/source doc/build/html
 
 [testenv:pdf-docs]
 usedevelop = False
 whitelist_externals = make
-deps = {[testenv:docs]deps}
 commands = sphinx-build -b latex doc/source doc/build/pdf
            make -C doc/build/pdf
 
 [testenv:releasenotes]
 usedevelop = False
-deps = {[testenv:docs]deps}
 commands =
   sphinx-build -a -E -W -d releasenotes/build/doctrees -b html releasenotes/source releasenotes/build/html