Revert some changes that accidentally got committed as a part of another fix.

git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.2@53134 65c4cc65-6c06-0410-ace0-fbb531ad65f3

utils.c

@@ -907,14 +907,3 @@ void ast_enable_packet_fragmentation(int sock)
 #endif
 }
 
-AST_MUTEX_DEFINE_STATIC(fetchadd_m); /* used for all fetc&add ops */
-
-int ast_atomic_fetchadd_int_slow(volatile int *p, int v)
-{
-        int ret;
-        ast_mutex_lock(&fetchadd_m);
-        ret = *p;
-        *p += v;
-        ast_mutex_unlock(&fetchadd_m);
-        return ret;
-}