housekeeping: delete .travis.yml (via #4888)

.travis.yml

@@ -1,58 +0,0 @@
-language: node_js
-node_js:
-- '6.9'
-cache:
-  directories:
-    - node_modules
-services:
-  - docker
-branches:
-  only:
-  - master
-  - /^v\d+\.\d+(\.\d+)?(-\S*)?$/
-install: "npm i && npm update"
-before_deploy:
-  - npm run build
-env:
-  - DOCKER_IMAGE_NAME=swaggerapi/swagger-ui
-script:
-  - npm test
-deploy:
-  - provider: npm
-    email: apiteam@swagger.io
-    skip_cleanup: true
-    api_key:
-      secure: "YKk5L1BL4oAixvLjWp+i85fNFXK85HKOlUt6QypkZkt23My5aywuYsv5VCLjjOtuWc72zbmOzP82DTBsuRswCRViXWCiNYhl42QTdvadHu0uIlM/FL6aNlvPpzXIws4bMvz1aYOTzFTnSnNuvCTzF1daW0+2ClOo3r0nLEdDfFg="
-    on:
-      tags: true
-      repo: swagger-api/swagger-ui
-      node: '6.9'
-  - provider: script
-    skip_cleanup: true
-    script: swagger-ui-dist-package/deploy.sh
-    on:
-      tags: true
-      repo: swagger-api/swagger-ui
-      node: '6.9'
-after_success:
-  - if [ $DOCKER_HUB_USERNAME ]; then
-      docker login --username=$DOCKER_HUB_USERNAME --password=$DOCKER_HUB_PASSWORD;
-
-      if [ ! -z "$TRAVIS_TAG" ]; then
-        DOCKER_IMAGE_TAG=${TRAVIS_TAG#?};
-      else
-        DOCKER_IMAGE_TAG=unstable;
-      fi;
-      docker build -t $DOCKER_IMAGE_NAME .;
-      if [ ! -z "$TRAVIS_TAG" ]; then
-        docker tag $DOCKER_IMAGE_NAME $DOCKER_IMAGE_NAME:$DOCKER_IMAGE_TAG;
-        docker push $DOCKER_IMAGE_NAME:$DOCKER_IMAGE_TAG;
-        docker tag $DOCKER_IMAGE_NAME $DOCKER_IMAGE_NAME:latest;
-        docker push $DOCKER_IMAGE_NAME:latest;
-      else
-        docker tag $DOCKER_IMAGE_NAME $DOCKER_IMAGE_NAME:$DOCKER_IMAGE_TAG;
-        docker push $DOCKER_IMAGE_NAME:$DOCKER_IMAGE_TAG;
-      fi;
-    fi;
-  - npm run build-bundle
-  - bundlesize