[PATCH v5 13/13] refs/files: remove unused "errno != ENOTDIR" condition

As a follow-up to the preceding commit where we removed the adjacent
"errno == EISDIR" condition in the same function, remove the
"last_errno != ENOTDIR" condition here.

It's not possible for us to hit this condition added in
5b2d8d6f218 (lock_ref_sha1_basic(): improve diagnostics for ref D/F
conflicts, 2015-05-11). Since a1c1d8170db (refs_resolve_ref_unsafe:
handle d/f conflicts for writes, 2017-10-06) we've explicitly caught
these in refs_resolve_ref_unsafe() before returning NULL:

	if (errno != ENOENT &&
	    errno != EISDIR &&
	    errno != ENOTDIR)
		return NULL;

We'd then always return the refname from refs_resolve_ref_unsafe()
even if we were in a broken state as explained in the preceding
commit. The elided context here is a call to refs_resolve_ref_unsafe().

Signed-off-by: Ævar Arnfjörð Bjarmason <redacted>
---
 refs/files-backend.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/refs/files-backend.c b/refs/files-backend.c
index bed2ab25c3a..ab666af4b75 100644
--- a/refs/files-backend.c
+++ b/refs/files-backend.c

@@ -893,8 +893,7 @@ static struct ref_lock *lock_ref_oid_basic(struct files_ref_store *refs,
 				     RESOLVE_REF_NO_RECURSE,
 				     &lock->old_oid, type)) {
 		last_errno = errno;
-		if (last_errno != ENOTDIR ||
-		    !refs_verify_refname_available(&refs->base, refname,
+		if (!refs_verify_refname_available(&refs->base, refname,
 						   NULL, NULL, err))
 			strbuf_addf(err, "unable to resolve reference '%s': %s",
 				    refname, strerror(last_errno));

-- 
2.33.0.662.g438caf9576d