remove windows and linux builds from travis, since we do those on circle now.

.travis.yml

@@ -2,8 +2,6 @@ env:
   - USER=travis GO111MODULE=off
 
 os:
-  - windows
-  - linux
   - osx
 
 sudo: false
@@ -13,12 +11,6 @@ language: go
 go:
   - 1.12.x
 
-before_install:
-  - >
-    if [[ "$TRAVIS_OS_NAME" == "windows" ]];
-    then choco install -y make;
-    fi
-
 script:
   - df -h
   - make ci
@@ -28,6 +20,4 @@ branches:
     - master
 
 matrix:
-  allow_failures:
-    - os: windows
   fast_finish: true