Update travis build

Author: 3y3

.travis.yml

@@ -39,8 +39,6 @@ before_install:
 
   - export PATH="./node_modules/.bin/:$PATH"
 
-  - npm install -g node-gyp@latest
-
   - PUBLISH_BINARY=false
   - if [[ $TRAVIS_BRANCH == `git describe --tags --always HEAD` ]]; then PUBLISH_BINARY=true; fi;