removes the ocaml version file

See ocaml/ocaml#9895 for more details

Author: ivg

.github/workflows/build-dev-repo.yml

@@ -44,6 +44,7 @@ jobs:
         if: matrix.os == 'macos-latest'
         run: |
           rm -rf /usr/local/bin/2to3
+          rm $(ocamlc -where)/lib/ocaml/version
           brew unlink gcc@9
           brew update
           brew upgrade