show-ref: remove a stale comment

When cf0adba ("Store peeled refs in packed-refs file.",
2006-11-19) made the command to die with a message on error even
when --quiet is passed, it left the comment to say it changed the
semantics.  But that kind of information belongs to the log message,
not in-code comment.  Besides, the behaviour after the change has
been the established one for the past 10 years ;-)

Signed-off-by: Junio C Hamano <[email protected]>

Author: gitster

builtin/show-ref.c

@@ -22,10 +22,6 @@ static void show_one(const char *refname, const struct object_id *oid)
 	const char *hex;
 	struct object_id peeled;
 
-	/* This changes the semantics slightly that even under quiet we
-	 * detect and return error if the repository is corrupt and
-	 * ref points at a nonexistent object.
-	 */
 	if (!has_sha1_file(oid->hash))
 		die("git show-ref: bad ref %s (%s)", refname,
 		    oid_to_hex(oid));