Remove nsp check from Travis YML (#4403)

nsp is done through a GitHub PR hook and managed separately from Travis CI

Author: addisonElliott

.travis.yml

@@ -54,7 +54,7 @@ jobs:
       env: 
       before_script: skip
       after_script: skip
-      script: npm install -g nsp && nsp check
+      script: skip
       deploy:
         - provider: script
           skip_cleanup: true