delete travis canary of webpack

Author: fengwan

.travis.yml

@@ -19,11 +19,6 @@ jobs:
       env: WEBPACK_VERSION=latest JOB_PART=coverage
       script: npm run travis:$JOB_PART
       after_success: 'bash <(curl -s https://codecov.io/bash)'
-    - stage: Webpack canary
-      before_script: npm i --no-save git://github.com/webpack/webpack.git#master
-      script: npm run travis:$JOB_PART
-      node_js: 8
-      env: WEBPACK_VERSION=canary JOB_PART=test
 before_install:
   - 'if [[ `npm -v` != 5* ]]; then npm i -g npm@^5.0.0; fi'
   - nvm --version