message: remove macOS work-around that is no longer needed
diff: @@ -38,14 +38,6 @@ jobs:
  if: runner.os == 'Linux'
  run: echo "MIRIFLAGS=-Zmiri-tag-gc=1" >> $GITHUB_ENV
  - # We install gnu-tar because BSD tar is buggy on macOS builders of GHA.
  - # See <https://github.com/actions/cache/issues/403>.
  - - name: Install GNU tar
  - if: runner.os == 'macOS'
  - run: |
  - brew install gnu-tar
  - echo "/usr/local/opt/gnu-tar/libexec/gnubin" >> $GITHUB_PATH
  -
  # Cache the global cargo directory, but NOT the local `target` directory which
  # we cannot reuse anyway when the nightly changes (and it grows quite large
  # over time).
  