Remove python 2 from CI

Python 2 support was dropped, there is not need to run tests in py2

Author: stsewd

Diff for: .appveyor.yml

@@ -5,9 +5,6 @@ environment:
     CYGWIN64_GIT_PATH: "C:\\cygwin64\\bin;%GIT_DAEMON_PATH%"
 
     matrix:
-      - PYTHON: "C:\\Python27"
-        PYTHON_VERSION: "2.7"
-        GIT_PATH: "%GIT_DAEMON_PATH%"
       - PYTHON: "C:\\Python34-x64"
         PYTHON_VERSION: "3.4"
         GIT_PATH: "%GIT_DAEMON_PATH%"
@@ -26,12 +23,6 @@ environment:
         MAYFAIL: "yes"
         GIT_PATH: "%GIT_DAEMON_PATH%"
         ## Cygwin
-      - PYTHON: "C:\\Miniconda-x64"
-        PYTHON_VERSION: "2.7"
-        IS_CONDA: "yes"
-        IS_CYGWIN: "yes"
-        MAYFAIL: "yes"
-        GIT_PATH: "%CYGWIN_GIT_PATH%"
       - PYTHON: "C:\\Python35-x64"
         PYTHON_VERSION: "3.5"
         IS_CYGWIN: "yes"

Diff for: test-requirements.txt

@@ -3,4 +3,3 @@ coverage
 flake8
 nose
 tox
-mock; python_version=='2.7'

Diff for: tox.ini

@@ -1,5 +1,5 @@
 [tox]
-envlist = py27,py34,py35,py36,py37,flake8
+envlist = py34,py35,py36,py37,flake8
 
 [testenv]
 commands = nosetests {posargs}