build: remove Windows from travis testing as no colors ever

.travis.yml

@@ -6,24 +6,6 @@ python:
   - 3.7
   - 3.8-dev
 
-matrix:
-  include:
-    - os: windows           # Windows 10
-      language: shell       # 'language: python' is an error on Travis CI Windows
-      python: 2.7
-      before_install:
-        - choco install python2
-        - python -m pip install --upgrade pip
-      env: PATH=/c/Python27:/c/Python27/Scripts:$PATH
-
-    - os: windows           # Windows 10
-      language: shell       # 'language: python' is an error on Travis CI Windows
-      python: 3.7
-      before_install:
-        - choco install python3
-        - python -m pip install --upgrade pip
-      env: PATH=/c/Python37:/c/Python37/Scripts:$PATH
-
 install:
   - python -m pip install colorama flake8
   - if [[ $(python -c "import sys; print(sys.version_info >= (3,5,))") == "True" ]]; then pip install flake8-bugbear; fi