Update .travis.yml

Author: konakonall

.travis.yml

@@ -15,7 +15,6 @@ notifications:
     recipients:
       - wjielai@tencent.com
       - fysntian@tencent.com
-      - burningzhan@tencent.com 
 script:
 - pycodestyle --max-line-length=180 qcloud_cos/.
 - nosetests -s -v ut/