No need to reinstall Python 2 on OS X images

Python 2 seems to be installed by default on newer travis images

Author: iMichka

.travis.yml

@@ -106,7 +106,6 @@ matrix:
 before_install:
  # OS X
   - if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then travis_retry brew update; fi
-  - if [[ "$TRAVIS_OS_NAME" == "osx" ]] && [[ $TRAVIS_PYTHON_VERSION == 2 ]]; then brew install python; fi
   - if [[ "$TRAVIS_OS_NAME" == "osx" ]] && [[ $TRAVIS_PYTHON_VERSION == 3 ]]; then brew install python3; fi
   - if [[ "$TRAVIS_OS_NAME" == "osx" ]] && [[ $TRAVIS_PYTHON_VERSION == 3 ]]; then sudo ln -sf /usr/local/bin/pip3 /usr/local/bin/pip; fi
   - if [[ "$TRAVIS_OS_NAME" == "osx" ]] && [[ $TRAVIS_PYTHON_VERSION == 3 ]]; then sudo ln -sf /usr/local/bin/python3 /usr/local/bin/python; fi