test_brineco2pvt: no reason to initialize MPI here

thus we no longer depend on dune-common

tests/test_co2brinepvt.cpp

@@ -49,8 +49,6 @@
 #include <opm/input/eclipse/Python/Python.hpp>
 #include <opm/input/eclipse/Schedule/Schedule.hpp>
 
-#include <dune/common/parallel/mpihelper.hh>
-
 // values of strings based on the first SPE1 test case of opm-data.  note that in the
 // real world it does not make much sense to specify a fluid phase using more than a
 // single keyword, but for a unit test, this saves a lot of boiler-plate code.
@@ -280,10 +278,8 @@ inline void testAll()
     ensurePvtApiBrine<FooEval>(brinePvt);
 }
 
-int main(int argc, char **argv)
+int main()
 {
-    Dune::MPIHelper::instance(argc, argv);
-
     testAll<double>();
     testAll<float>();
     return 0;