delete_ref(): move declaration to refs.h

Also

* Add a docstring

* Rename the second parameter to "old_sha1", to be consistent with the
  convention used elsewhere in the refs module

Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

1 files changed, 0 insertions, 2 deletions

diff --git a/cache.h b/cache.h
index 571c98f5e2..be92121193 100644
--- a/cache.h
+++ b/cache.h
@@ -585,8 +585,6 @@ extern void update_index_if_able(struct index_state *, struct lock_file *);
 extern int hold_locked_index(struct lock_file *, int);
 extern void set_alternate_index_output(const char *);
 
-extern int delete_ref(const char *, const unsigned char *sha1, unsigned int flags);
-
 /* Environment bits from configuration mechanism */
 extern int trust_executable_bit;
 extern int trust_ctime;