ADIOS: Revert Patch (#8463)

That patch is only a partial solution and does not solve the
issue. Revert is, unnecessary.

var/spack/repos/builtin/packages/adios/nompi.patch

@@ -1,16 +0,0 @@
-diff --git a/src/core/adios_internals_mxml.c b/src/core/adios_internals_mxml.c
-index 513fd45c..b9296050 100644
---- a/src/core/adios_internals_mxml.c
-+++ b/src/core/adios_internals_mxml.c
-@@ -2173,8 +2173,9 @@ int adios_parse_config (const char * config, MPI_Comm comm)
-     char * buffer = NULL;
-     //#if HAVE_MPI
-     int buffer_size = 0;
--    int rank;
--    MPI_Comm_rank (comm, &rank);
-+    int rank = 0;
-+    if (comm != MPI_COMM_NULL)
-+        MPI_Comm_rank (comm, &rank);
-     init_comm = comm;
-     if (rank == 0)
-     {

var/spack/repos/builtin/packages/adios/package.py

@@ -121,9 +121,6 @@ class Adios(AutotoolsPackage):
     #   https://github.com/ornladios/ADIOS/commit/3b21a8a41509
     #   https://github.com/spack/spack/issues/1683
     patch('adios_1100.patch', when='@:1.10.0^hdf5@1.10:')
-    # Fix ADIOS <=1.13.1 serial compile against parallel library
-    #   https://github.com/ornladios/ADIOS/pull/182
-    patch('nompi.patch', when='@1.10.0:1.13.1')
 
     def validate(self, spec):
         """Checks if incompatible variants have been activated at the same time