chore: Clean up env var from Travis config

Author: Veselina Radeva

.travis.yml

@@ -1,8 +1,6 @@
 matrix:
   include:
     - stage: "Lint"
-      env:		
-        - NSUI_NOPROMPT: 1
       language: node_js
       os: linux
       node_js: "6"
@@ -11,7 +9,6 @@ matrix:
       os: osx
       env:
         - Platform="iOS"
-        - NSUI_NOPROMPT: 1
       osx_image: xcode8.3
       language: node_js 
       node_js: "6"
@@ -21,14 +18,12 @@ matrix:
       os: linux
       env:
         - Platform="Android"
-        - NSUI_NOPROMPT: 1
       jdk: oraclejdk8
       before_install: nvm install 6.10.3
       script: cd demo && npm run build.plugin && npm i && npm run build-android-bundle && cd ../demo-angular && npm run build.plugin && npm i && npm run build-android-bundle
     - stage: "Build"
       env: 
         - Android="25"
-        - NSUI_NOPROMPT: 1
       language: android
       os: linux
       jdk: oraclejdk8
@@ -38,7 +33,6 @@ matrix:
       env: 
         - iOS="10.3"
         - Xcode="8.3"
-        - NSUI_NOPROMPT: 1
       osx_image: xcode8.3
       language: node_js 
       node_js: "6"