Remove extra MPI initialization.

Initialization is now done in the Main::initMPI() method.
For configurations with dune-fem, this also caused crashes
with dune-fem versions prior to 2.8.

flow/flow_ebos_solvent.cpp

@@ -23,14 +23,6 @@
 #include <opm/simulators/flow/SimulatorFullyImplicitBlackoilEbos.hpp>
 #include <opm/simulators/flow/Main.hpp>
 
-#if HAVE_DUNE_FEM
-#include <dune/fem/misc/mpimanager.hh>
-#else
-#include <dune/common/parallel/mpihelper.hh>
-#endif
-
-#include <filesystem>
-
 namespace Opm {
 namespace Properties {
 namespace TTag {
@@ -68,13 +60,6 @@ int flowEbosSolventMain(int argc, char** argv, bool outputCout, bool outputFiles
     // with incorrect locale settings.
     resetLocale();
 
-    // initialize MPI, finalize is done automatically on exit
-#if HAVE_DUNE_FEM
-    Dune::Fem::MPIManager::initialize(argc, argv);
-#else
-    Dune::MPIHelper::instance(argc, argv).rank();
-#endif
-
     FlowMainEbos<Properties::TTag::EclFlowSolventProblem>
         mainfunc {argc, argv, outputCout, outputFiles};
     return mainfunc.execute();