travis: new osx image has python preinstalled and can't handle brew u…

…pdate

.travis.yml

@@ -36,7 +36,7 @@ addons:
   ssh_known_hosts: frs.sourceforge.net
 
 before_install:
-  - if [ $TRAVIS_OS_NAME == osx ]; then brew update && brew install sdl python openal-soft freetype sdl_mixer libpng libvorbis; fi
+  - if [ $TRAVIS_OS_NAME == osx ]; then brew update && brew install sdl openal-soft freetype sdl_mixer libpng libvorbis; fi
   - touch id_travissfbot
   - if [[ $TRAVIS_SECURE_ENV_VARS == "true" ]]; then openssl aes-256-cbc -K $encrypted_798b15af9f34_key -iv $encrypted_798b15af9f34_iv -in testing/id_travissfbot.enc -out id_travissfbot -d; fi
   - chmod 0600 id_travissfbot