Remove redundant deps in tox.ini.

Tox installs the current tree (either via an sdist or as a develop
install) always. Our requirements.txt are reflected into the metadata
of that tree, so we shouldn't use requirements.txt directly - it just
means that we'd be hiding from ourselves issues like e.g. using URLs
which can't be reflected properly.

Change-Id: Id096f1d1971cb8a19f9e86ba57957b39e00bd6f5

tox.ini

@@ -16,8 +16,7 @@ setenv = VIRTUAL_ENV={envdir}
          OS_TEST_PATH=./nova/tests/unit
          LANGUAGE=en_US
          LC_ALL=en_US.utf-8
-deps = -r{toxinidir}/requirements.txt
-       -r{toxinidir}/test-requirements.txt
+deps = -r{toxinidir}/test-requirements.txt
 commands =
   find . -type f -name "*.pyc" -delete
   bash tools/pretty_tox.sh '{posargs}'
@@ -34,8 +33,6 @@ commands =
 
 [testenv:py34]
 setenv = {[testenv]setenv}
-deps = -r{toxinidir}/requirements.txt
-       -r{toxinidir}/test-requirements.txt
 commands =
   find . -type f -name "*.pyc" -delete
   python -m subunit.run discover -t . ./nova/tests/ --list
@@ -47,8 +44,6 @@ install_command = pip install -U --force-reinstall {opts} {packages}
 setenv = VIRTUAL_ENV={envdir}
        OS_TEST_PATH=./nova/tests/functional
        LANGUAGE=en_US
-deps = -r{toxinidir}/requirements.txt
-       -r{toxinidir}/test-requirements.txt
 commands =
   find . -type f -name "*.pyc" -delete
   bash tools/pretty_tox.sh '{posargs}'
@@ -77,7 +72,6 @@ commands =
   oslo-config-generator --config-file=etc/nova/nova-config-generator.conf
 
 [testenv:bandit]
-deps = -r{toxinidir}/test-requirements.txt
 commands = bandit -c bandit.yaml -r nova -n 5 -ll
 
 [flake8]
@@ -104,5 +98,4 @@ import_exceptions = nova.i18n
 # this also means that pip-missing-reqs must be installed separately, outside
 # of the requirements.txt files
 deps = pip_missing_reqs
-       -rrequirements.txt
 commands=pip-missing-reqs -d --ignore-file=nova/tests/* --ignore-file=nova/test.py nova