Changes in azure-pipelines.yml and tox.ini inspired by pandas-dev#25217

Author: h-vetinari

azure-pipelines.yml

@@ -10,7 +10,6 @@ jobs:
     name: Linux
     vmImage: ubuntu-16.04
 
-# Windows Python 2.7 needs VC 9.0 installed, handled in the template
 - template: ci/azure/windows.yml
   parameters:
     name: Windows

tox.ini

@@ -4,14 +4,14 @@
 # and then run "tox" from this directory.
 
 [tox]
-envlist = py27, py35, py36
+envlist = py35, py36, py37
 
 [testenv]
 deps =
     cython
     nose
     pytest
-    pytz>=2011k
+    pytz>=2015.4
     python-dateutil
     beautifulsoup4
     lxml
@@ -43,40 +43,12 @@ commands =
     # tox should provide a preinstall-commands hook.
     pip uninstall pandas -qy
 
-[testenv:py27]
-deps =
-    numpy==1.8.1
-    boto
-    bigquery
-    {[testenv]deps}
-
 [testenv:py35]
 deps =
-    numpy==1.10.0
+    numpy==1.12.0
     {[testenv]deps}
 
 [testenv:py36]
 deps =
     numpy
     {[testenv]deps}
-
-[testenv:openpyxl1]
-usedevelop = True
-deps =
-    {[testenv]deps}
-    openpyxl<2.0.0
-commands = {envbindir}/pytest {toxinidir}/pandas/io/tests/test_excel.py
-
-[testenv:openpyxl20]
-usedevelop = True
-deps =
-    {[testenv]deps}
-    openpyxl<2.2.0
-commands = {envbindir}/pytest {posargs} {toxinidir}/pandas/io/tests/test_excel.py
-
-[testenv:openpyxl22]
-usedevelop = True
-deps =
-    {[testenv]deps}
-    openpyxl>=2.2.0
-commands = {envbindir}/pytest {posargs} {toxinidir}/pandas/io/tests/test_excel.py