bcachefs: kill retry_estale() in bch2_ioctl_subvolume_create()

this was likely originally cribbed, and has been dead code, and Al is
working on removing it from the tree.

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
This commit is contained in:
Kent Overstreet 2024-10-11 16:21:14 -04:00
commit 3d1ea1c0ae