cg: Remove write-only variable

Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

cgroup.c

@@ -411,13 +411,10 @@ static int add_cgroup(const char *fpath, const struct stat *sb, int typeflag)
 {
 	struct cgroup_dir *ncd = NULL, *match;
 	int ret = 0;
-	char pbuf[PATH_MAX];
 
 	if (typeflag == FTW_D) {
 		int mtype;
 
-		strncpy(pbuf, fpath, PATH_MAX);
-
 		pr_info("adding cgroup %s\n", fpath);
 
 		ncd = xmalloc(sizeof(*ncd));