/*D
   MPI_Comm_delete_attr - Deletes an attribute value associated with a key on a communicator

Synopsis:
.vb
int MPI_Comm_delete_attr(MPI_Comm comm, int comm_keyval)
.ve

Input Parameters:
+ comm - communicator from which the attribute is deleted (handle)
- comm_keyval - key value (integer)

.N ThreadSafe

.N Fortran

.N Errors
.N MPI_SUCCESS
.N MPI_ERR_COMM
.N MPI_ERR_KEYVAL
.N MPI_ERR_OTHER

.seealso: MPI_Comm_set_attr, MPI_Comm_create_keyval
D*/

/*D
   MPI_Attr_delete - Deletes an attribute value associated with a key on a communicator

Synopsis:
.vb
int MPI_Attr_delete(MPI_Comm comm, int keyval)
.ve

Input Parameters:
+ comm - communicator to which attribute is attached (handle)
- keyval - keyval (integer)

.N Deprecated
   The replacement for this routine is 'MPI_Comm_delete_attr'.

.N ThreadSafe

.N Fortran

.N Errors
.N MPI_SUCCESS
.N MPI_ERR_COMM
.N MPI_ERR_KEYVAL
.N MPI_ERR_OTHER

D*/

