fix unit tests

Author: pcarruscag

UnitTests/test_driver.cpp

@@ -38,15 +38,12 @@ int main(int argc, char *argv[]) {
 
   /*--- Startup MPI, if supported ---*/
 #ifdef HAVE_MPI
-  int  buffsize;
-  char *buffptr;
 #ifdef HAVE_OMP
   int provided;
   SU2_MPI::Init_thread(&argc, &argv, MPI_THREAD_FUNNELED, &provided);
 #else
   SU2_MPI::Init(&argc, &argv);
 #endif
-  SU2_MPI::Buffer_attach( malloc(BUFSIZE), BUFSIZE );
   SU2_Comm MPICommunicator(MPI_COMM_WORLD);
 #else
   SU2_Comm MPICommunicator(0);
@@ -56,11 +53,7 @@ int main(int argc, char *argv[]) {
   int result = Catch::Session().run(argc, argv);
 
   /*--- Finalize MPI parallelization ---*/
-#ifdef HAVE_MPI
-  SU2_MPI::Buffer_detach(&buffptr, &buffsize);
-  free(buffptr);
   SU2_MPI::Finalize();
-#endif
 
   return result;
 }