tox/appveyor: don't override 'basepython', call tox -e py

Author: anthrotype

appveyor.yml

@@ -3,20 +3,14 @@ environment:
     - PYTHON: "C:\\Python27"
       PYTHON_VERSION: "2.7.x"
       PYTHON_ARCH: "32"
-      TOXENV: "py27"
-      TOXPYTHON: "C:\\Python27\\python.exe"
 
     - PYTHON: "C:\\Python36-x64"
       PYTHON_VERSION: "3.6.x"
       PYTHON_ARCH: "64"
-      TOXENV: "py36"
-      TOXPYTHON: "C:\\Python36-x64\\python.exe"
 
     - PYTHON: "C:\\Python37-x64"
       PYTHON_VERSION: "3.7.0"
       PYTHON_ARCH: "64"
-      TOXENV: "py37"
-      TOXPYTHON: "C:\\Python37-x64\\python.exe"
 
 init:
   - "ECHO %PYTHON% %PYTHON_VERSION% %PYTHON_ARCH%"
@@ -41,4 +35,4 @@ install:
 build: false
 
 test_script:
-  - "tox"
+  - "tox -e py"

tox.ini

@@ -2,13 +2,6 @@
 envlist = py{27,36,37}
 
 [testenv]
-basepython =
-    # we use TOXPYTHON env variable to specify the location of Appveyor Python
-    py27: {env:TOXPYTHON:python2.7}
-    py34: {env:TOXPYTHON:python3.4}
-    py35: {env:TOXPYTHON:python3.5}
-    py36: {env:TOXPYTHON:python3.6}
-    py37: {env:TOXPYTHON:python3.7}
 deps =
     defcon
     fontPens