ci: 移除 travis

.travis.yml

@@ -1,18 +0,0 @@
-language: node_js
-node_js:
-  - 16.8.0
-cache:
-  directories:
-    - node_modules
-env:
-  - CI=false REACT_APP_DEPLOY_ENV=travis
-script:
-  - yarn lint
-  - yarn build
-deploy:
-  provider: pages
-  skip_cleanup: true
-  github_token: $github_token
-  local_dir: build
-  on:
-    branch: master

README.md

@@ -16,7 +16,6 @@
 
 <p align="center">
   <a href="https://github.com/Kaiyiwing/qwerty-learner/blob/master/LICENSE"><img src="https://img.shields.io/github/license/KaiyiWing/qwerty-learner" alt="License"></a>
-  <a><img src="https://travis-ci.com/Kaiyiwing/qwerty-learner.svg?branch=master" alt="Build State"></a>
   <a><img src="https://img.shields.io/badge/PRs-welcome-brightgreen.svg"/></a>
   <a><img src="https://img.shields.io/badge/Powered%20by-React-blue"/></a>
 </p>