coll/base: fix compiler warning

Remove unused variable.

Signed-off-by: Jeff Squyres <[email protected]>

Author: jsquyres

ompi/mca/coll/base/coll_base_allgatherv.c

@@ -16,6 +16,7 @@
  * Copyright (c) 2015-2016 Research Organization for Information Science
  *                         and Technology (RIST). All rights reserved.
  * Copyright (c) 2017      IBM Corporation.  All rights reserved.
+ * Copyright (c) 2017 Cisco Systems, Inc.  All rights reserved
  * $COPYRIGHT$
  *
  * Additional copyrights may follow
@@ -603,7 +604,7 @@ ompi_coll_base_allgatherv_intra_basic_default(const void *sbuf, int scount,
                                               struct ompi_communicator_t *comm,
                                               mca_coll_base_module_t *module)
 {
-    int i, size, rank, err;
+    int size, rank, err;
     MPI_Aint extent, lb;
     char *send_buf = NULL;
     struct ompi_datatype_t *newtype, *send_type;