Removed support for python 2.7

.travis.yml

@@ -3,22 +3,19 @@ cache:
   directories:
       - "$HOME/.cache"
       - "$HOME/.ccache"
-env:
-  - PYTHON_VERSION=2.7
-  - PYTHON_VERSION=3.5
 before_install:
     - ccache -s
     - export PATH=/usr/lib/ccache:${PATH}
     - wget https://package-data.enthought.com/edm/rh5_x86_64/1.9/edm_1.9.2_linux_x86_64.sh && bash ./edm_1.9.2_linux_x86_64.sh -b -f -p $HOME
     - export PATH=${HOME}/edm/bin:${PATH}
     - edm install -y -e force-bootstrap click setuptools
-    - edm run -e force-bootstrap -- python -m ci build-env --python-version ${PYTHON_VERSION}
+    - edm run -e force-bootstrap -- python -m ci build-env
 script:
-    - edm run -e force-bootstrap -- python -m ci flake8 --python-version ${PYTHON_VERSION}
-    - edm run -e force-bootstrap -- python -m ci test --python-version ${PYTHON_VERSION}
-    - edm run -e force-bootstrap -- python -m ci docs --python-version ${PYTHON_VERSION}
+    - edm run -e force-bootstrap -- python -m ci flake8 
+    - edm run -e force-bootstrap -- python -m ci test
+    - edm run -e force-bootstrap -- python -m ci docs
 after_success:
-    - edm run -e force-bootstrap -- python -m ci coverage --python-version ${PYTHON_VERSION}
+    - edm run -e force-bootstrap -- python -m ci coverage
     - edm run -e force-bootstrap -- pip install codecov
     - edm run -e force-bootstrap -- codecov
     - bash <(curl -s https://codecov.io/bash)

ci/__main__.py

 import click
 from subprocess import check_call
 
-DEFAULT_PYTHON_VERSION = "2.7"
-PYTHON_VERSIONS = ["2.7", "3.5"]
+DEFAULT_PYTHON_VERSION = "3.5"
+PYTHON_VERSIONS = ["3.5"]
 
 CORE_DEPS = [
     "distribute_remove==1.0.0-4",