Refs trac:3091

Gah!  The "device" variable isn't used at all in this loop (my eye
glossed over the next line and thought that "device" was used in the
free() statement, but it's actually "devices" -- not "device").

This commit was SVN r29665.

The following Trac tickets were found above:
  Ticket 3091 --> https://svn.open-mpi.org/trac/ompi/ticket/3091

ompi/mca/btl/usnic/btl_usnic_stats.c

@@ -426,7 +426,6 @@ static void setup_mpit_pvars_enum(void)
     /* Free the strings (mca_base_var_enum_create() strdup()'ed them
        into private storage, so we don't need them any more) */
     for (i = 0; i < mca_btl_usnic_component.num_modules; ++i) {
-        device = mca_btl_usnic_component.usnic_active_modules[i]->device;
         free((char*) devices[i].string);
     }