remove imagemagick from macos builds

Author: hawkrives

.travis.yml

@@ -121,8 +121,6 @@ install:
   # install fastlane (if at first you don't succeed, try once more)
   - bundle install || bundle install
 
-  - if [[ $TRAVIS_OS_NAME == "osx" ]]; then brew install imagemagick; fi
-
 before_script:
   - if [[ $JS ]]; then greenkeeper-lockfile-update; fi
   # Fire up the Android emulator