Take out version checks

Author: franzpoeschel

.github/workflows/linux.yml

@@ -183,9 +183,6 @@ jobs:
         eval $(spack env activate --sh .github/ci/spack-envs/gcc13_py312_mpich_h5_ad2/)
         spack install
 
-        mpiexec --version
-        mpicxx --version
-
         share/openPMD/download_samples.sh build
         cmake -S . -B build \
           -DopenPMD_USE_PYTHON=OFF \