Fix travis build failure

Author: devxoul

.travis.yml

@@ -1,5 +1,5 @@
 language: objective-c
-osx_image: xcode8
+osx_image: xcode8.3
 sudo: false
 rvm:
   - 2.3
@@ -8,10 +8,5 @@ cache:
   - bundler
   - cocoapods
 
-install:
-  - bundle install --deployment
-  - bundle exec pod --version
-  - bundle exec pod repo update --verbose
-
 script:
   - bundle exec pod lib lint --verbose --allow-warnings --fail-fast