Remove our unused jobs that now run in linters

Change-Id: I5c83b28ce3ef6c4080c68fa2fa353ad118ef7b71
Depends-On: I48faeb61fd3d630e7d7b6c949afcf10f724b0b72

tox.ini

 [tox]
 minversion = 1.6
 skipsdist = True
-envlist = py34,py27,pep8,pypy
+envlist = py34,py27,linters,pypy
 
 [testenv]
 usedevelop=True
@@ -24,26 +24,12 @@ commands =
   {toxinidir}/tools/validate-all-yaml.sh
   {toxinidir}/tools/validate-all-maintainer.sh
 
-[testenv:pep8]
-commands =
-  flake8
-
 [testenv:venv]
 commands = {posargs}
 
 [testenv:docs]
 commands = python setup.py build_sphinx
 
-[testenv:validate-contents]
-commands =
-  {toxinidir}/tools/validate-all-json.sh
-  {toxinidir}/tools/validate-all-yaml.sh
-  {toxinidir}/tools/validate-all-maintainer.sh
-
-[testenv:bashate]
-commands =
-  {toxinidir}/tools/run-bashate.sh
-
 [testenv:setupenv]
 whitelist_externals = bash
 commands = bash -c tests/setup_gate.sh