Delete .travis.yml

.travis.yml

-language: python
-python: 3.6
-
-install: 
-  - ':'
-
-script: 
-  - ':'
-
-after_script:
-  - git config user.name ${GH_UN}
-  - git config user.email ${GH_EMAIL}
-  - git push "https://${GH_TOKEN}@github.com/${GH_USER}/${GH_REPO}.git" v2.0.11-md:${GH_BRANCH} -f
-  
-env:
-  global:
-    - GH_UN=jiangzhonglian
-    - GH_EMAIL=jiang-s@163.com
-    - GH_USER=apachecn
-    - GH_REPO=lightgbm-doc-zh
-    - GH_BRANCH=gh-pages
\ No newline at end of file