Merge pull request #9331 from jsquyres/pr/revert-mpi-init-thread-change

v4.0.x: Revert "Allow mpi_init_thread to override the MPI_THREAD_LEVEL"

Author: gpaulsen

ompi/mpi/c/init_thread.c

@@ -48,11 +48,6 @@ int MPI_Init_thread(int *argc, char ***argv, int required,
                     int *provided)
 {
     int err;
-    char *env;
-
-    if (NULL != (env = getenv("OMPI_MPI_THREAD_LEVEL")))  {
-        required = atoi(env);
-    }
 
     ompi_hook_base_mpi_init_thread_top(argc, argv, required, provided);