Merge pull request #1201 from OceanParcels/Fixing_sh_None_command_not_found_warning

Fixing the `sh: None: command not found warning`

Author: erikvansebille

parcels/compilation/codecompiler.py

@@ -97,7 +97,6 @@ def __init__(self, cppargs=None, ldargs=None, incdirs=None, libdirs=None, libs=N
             mpicc = mpicc_env
             mpicc = "mpicc" if mpicc is None and os._exists("mpicc") else None
             mpicc = "mpiCC" if mpicc is None and os._exists("mpiCC") else None
-            os.system("%s --version" % (mpicc))
         self._compiler = mpicc if MPI and mpicc is not None else cc_env if cc_env is not None else "gcc"
         opt_flags = ['-g', '-O3']
         arch_flag = ['-m64' if calcsize("P") == 8 else '-m32']