Revert "Update build script to fix Mac CI"

JaredCrean2 · web-flow · commit 16caf50ac00c · 2017-05-27T23:08:57.000-04:00
diff --git a/conf/travis-install-mpi.sh b/conf/travis-install-mpi.sh
@@ -12,6 +12,7 @@ case "$os" in
     Darwin)
         brew update
         brew upgrade cmake
+	    brew upgrade gcc
         case "$MPI_IMPL" in
             mpich|mpich3)
                 brew install mpich
