don't specify osx image

2019-01-16 14:59:45 +01:00 · 2019-01-16 14:59:45 +01:00 · 12d1c7192a
--- a/.travis.yml
+++ b/.travis.yml
@ -17,9 +17,8 @@ matrix:
      env:
        - MAKETARGET=test-all
    - os: osx
-      osx_image: xcode9
      env:
-        - MATRIX_EVAL="brew upgrade && brew install gcc && CC=gcc-8 && CXX=g++-8"
+        - MATRIX_EVAL="brew install gcc && CC=gcc-8 && CXX=g++-8"
        - MAKETARGET=test-all

 before_install: