Remove Python 2

Python 2.7.18 was the final Python 2 release.

Author: tianon

.appveyor.yml

@@ -20,12 +20,6 @@ environment:
     - version: 3.7
       variant: windowsservercore-1809
       APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2019
-    - version: 2.7
-      variant: windowsservercore-ltsc2016
-      APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2017
-    - version: 2.7
-      variant: windowsservercore-1809
-      APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2019
 
 install:
   - ps: |

.travis.yml

@@ -51,18 +51,6 @@ matrix:
       env: VERSION=3.5 VARIANT=alpine3.11
     - os: linux
       env: VERSION=3.5 VARIANT=alpine3.10
-    - os: linux
-      env: VERSION=2.7 VARIANT=buster
-    - os: linux
-      env: VERSION=2.7 VARIANT=buster/slim
-    - os: linux
-      env: VERSION=2.7 VARIANT=stretch
-    - os: linux
-      env: VERSION=2.7 VARIANT=stretch/slim
-    - os: linux
-      env: VERSION=2.7 VARIANT=alpine3.11
-    - os: linux
-      env: VERSION=2.7 VARIANT=alpine3.10
 
 install:
   - git clone https://github.com/docker-library/official-images.git ~/official-images