removing uneeded permissions change

.travis.yml

@@ -13,8 +13,6 @@ before_install:
   - echo "deb http://dl.yarnpkg.com/debian/ stable main" | sudo tee /etc/apt/sources.list.d/yarn.list
   - sudo apt-get update -qq
   - sudo apt-get install -y -qq yarn
-  - sudo chmod +x client/build
-  - sudo chmod +x build
 
 cache:
   directories: