message: Travis: try not explicitly setting the compiler
diff: @@ -175,12 +175,6 @@ matrix:
  apt:
  sources:
  - ubuntu-toolchain-r-test
  - packages:
  - - g++-9 python3.7
  - env:
  - - MATRIX_EVAL="CC=gcc-9 && CXX=g++-9"
  - before_install:
  - - eval "${MATRIX_EVAL}"
  script:
  - python3 scripts/test_vector_sizes.py
  