Update tox.ini for tripleo-docs

Removes the pep8 and bindep tox environments. pep8 did not run
successfully as there is no test-requirements.txt file, and there is
nothing to test anyway. bindep also has nothing to test, so it's also
removed.

The deploy-guide tox environment is added to the default list so that
just running "tox" results in a full build of the documentation
including the user and deploy guide.

Change-Id: I1990556fec47905d2e137b51bcaefd15fe597dea

tox.ini

@@ -1,7 +1,7 @@
 [tox]
 minversion = 2.0
 skipsdist = True
-envlist = docs,pep8,bindep
+envlist = docs,deploy-guide
 
 [testenv]
 basepython = python3
@@ -30,30 +30,6 @@ commands =
   sphinx-build --keep-going -b latex doc/source doc/build/pdf
   make -C doc/build/pdf
 
-[testenv:pep8]
-whitelist_externals = bash
-deps = -r{toxinidir}/test-requirements.txt
-# We fail pretty horribly on bashate right now
-#commands = bash -c "find scripts -type f | xargs bashate -v"
-#           flake8
-commands = flake8
-
-[flake8]
-show-source = True
-exclude = .tox,dist,*.egg,build
-
 [testenv:deploy-guide]
 deps = {[testenv:docs]deps}
 commands = sphinx-build -a -E -W -d deploy-guide/build/doctrees --keep-going -b html deploy-guide/source deploy-guide/build/html
-
-[testenv:bindep]
-# Do not install any requirements. We want this to be fast and work even if
-# system dependencies are missing, since it's used to tell you what system
-# dependencies are missing! This also means that bindep must be installed
-# separately, outside of the requirements files, and develop mode disabled
-# explicitly to avoid unnecessarily installing the checked-out repo too (this
-# further relies on "tox.skipsdist = True" above).
-usedevelop = False
-deps = bindep
-commands =
-  bindep test