Merge ~mwhudson/curtin:no-py2 into curtin:master

[Michael Hudson-Doyle]

Stop running CI against Python 2

We are going to stop supporting Python 2 in future
development. There is plenty more stuff we can rip out as a
consequence of this but dropping it from CI is the first step and
unblocks other changes.

[Dan Bungert (dbungert)]

review: Approve

[Server Team CI bot (server-team-bot)]

PASSED: Continuous integration, rev:0d56c836aa4c0ea6c8e88613766c0ef85734e214
https://jenkins.ubuntu.com/server/job/curtin-ci/233/
Executed test runs:
    SUCCESS: https://jenkins.ubuntu.com/server/job/curtin-ci/nodes=metal-amd64/233/
    SUCCESS: https://jenkins.ubuntu.com/server/job/curtin-ci/nodes=metal-arm64/233/
    SUCCESS: https://jenkins.ubuntu.com/server/job/curtin-ci/nodes=metal-ppc64el/233/
    SUCCESS: https://jenkins.ubuntu.com/server/job/curtin-ci/nodes=metal-s390x/233/

Click here to trigger a rebuild:
https://jenkins.ubuntu.com/server/job/curtin-ci/233//rebuild

review: Approve (continuous-integration)

diff --git a/tox.ini b/tox.ini
index d9437c5..3e86c7a 100644
--- a/tox.ini
+++ b/tox.ini
@@ -3,12 +3,9 @@ minversion = 1.6
 skipsdist = True
 envlist =
    py3-flake8,
-   py27,
    py3,
    py3-pyflakes,
    py3-pylint,
-   py27-pylint,
-   trusty-py27,
    block-schema,
    xenial-py3
 
@@ -31,23 +28,6 @@ commands = {envpython} {toxinidir}/tools/noproxy {envpython} -m nose \
 basepython = python3
 sitepackages = true
 
-[testenv:py27]
-basepython = python2.7
-sitepackages = true
-# https://github.com/pypa/setuptools/issues/1963
-deps = {[testenv]deps}
-    setuptools<45
-
-# tox uses '--pre' by default to pip install.  We don't want that, and
-# 'pip_pre=False' isn't available until tox version 1.9.
-install_command = pip install {opts} {packages}
-
-[testenv:py2-flake8]
-basepython = python2
-deps = {[testenv]deps}
-    flake8
-commands = {envpython} -m flake8 {posargs:curtin}
-
 [testenv:py3-flake8]
 basepython = python3
 deps = {[testenv]deps}
@@ -68,15 +48,6 @@ deps = {[testenv]deps}
     git+https://git.launchpad.net/simplestreams
 commands = {envpython} -m pylint --errors-only {posargs:curtin tests/vmtests}
 
-[testenv:py27-pylint]
-# set basepython because tox 1.6 (trusty) does not support generated environments
-basepython = python2.7
-sitepackages = true
-deps = {[testenv]deps}
-   {[testenv:py27]deps}
-    pylint==1.8.1
-commands = {envpython} -m pylint --errors-only {posargs:curtin}
-
 [testenv:docs]
 deps = {[testenv]deps}
     sphinx
@@ -107,15 +78,6 @@ basepython = python3
 commands =
    {toxinidir}/tools/run-pyflakes3 {posargs}
 
-[testenv:trusty-py27]
-deps = {[testenv:trusty]deps}
-    setuptools<45
-
-basepython = python2.7
-sitepackages = true
-commands = {envpython} {toxinidir}/tools/noproxy {envpython} -m nose \
-    {posargs:tests/unittests}
-
 [testenv:trusty-py3]
 deps = {[testenv:trusty]deps}
 basepython = python3
@@ -129,13 +91,6 @@ deps =
    pyyaml==3.11
    oauthlib==1.0.3
 
-[testenv:xenial-py27]
-basepython = python27
-deps = {[testenv:xenial]deps}
-   {[testenv:py27]deps}
-commands = {envpython} {toxinidir}/tools/noproxy {envpython} -m nose \
-    {posargs:tests/unittests}
-
 [testenv:xenial-py3]
 basepython = python3
 sitepackages = true