bitmap: remove a useless assignment

Foud by cppcheck.

Signed-off-by: Brice Goglin <[email protected]>

Author: bgoglin

hwloc/bitmap.c

@@ -1,6 +1,6 @@
 /*
  * Copyright © 2009 CNRS
- * Copyright © 2009-2016 Inria.  All rights reserved.
+ * Copyright © 2009-2017 Inria.  All rights reserved.
  * Copyright © 2009-2011 Université Bordeaux
  * Copyright © 2009-2011 Cisco Systems, Inc.  All rights reserved.
  * See COPYING in top-level directory.
@@ -607,7 +607,6 @@ int hwloc_bitmap_taskset_sscanf(struct hwloc_bitmap_s *set, const char * __hwloc
   int count;
   int infinite = 0;
 
-  current = string;
   if (!strncmp("0xf...f", current, 7)) {
     /* infinite bitmap */
     infinite = 1;