btrfs-progs: test_skip_this_disk() isn't needed anymore

add_seen_fsid() which was introduced lately will eliminate
the mounted disks, so we don't need test_skip_this_disk()
anymore

Signed-off-by: Anand Jain <anand.jain@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Chris Mason <clm@fb.com>

utils.c

@@ -1967,21 +1967,6 @@ int test_dev_for_mkfs(char *file, int force_overwrite, char *estr)
  return 0;
 }
 
-static int test_skip_this_disk(char *path)
-{
- int fd;
-
- /*
- * this will eliminate disks which are mounted (btrfs)
- * and non-dm disk path when dm is enabled
- */
- fd = open(path, O_RDWR|O_EXCL);
- if (fd < 0)
- return 1;
- close(fd);
- return 0;
-}
-
 int btrfs_scan_lblkid(int update_kernel)
 {
  int fd = -1;
@@ -2006,8 +1991,6 @@ int btrfs_scan_lblkid(int update_kernel)
  continue;
  /* if we are here its definitely a btrfs disk*/
  strncpy(path, blkid_dev_devname(dev), PATH_MAX);
- if (test_skip_this_disk(path))
- continue;
 
  fd = open(path, O_RDONLY);
  if (fd < 0) {