fetch.c: remove an unused variable and dead code.

Funnily enough, this variable was never assigned ever since it
was introduced, and has been protecting some code that has never
been executed.

Signed-off-by: Junio C Hamano <junkio@cox.net>

fetch.c

@@ -9,8 +9,6 @@
 
 const char *write_ref = NULL;
 
-const unsigned char *current_ref = NULL;
-
 int get_tree = 0;
 int get_history = 0;
 int get_all = 0;
@@ -205,19 +203,12 @@ static int mark_complete(const char *path, const unsigned char *sha1)
 int pull(char *target)
 {
 	unsigned char sha1[20];
-	int fd = -1;
 
 	save_commit_buffer = 0;
 	track_object_refs = 0;
-	if (write_ref && current_ref) {
-		fd = lock_ref_sha1(write_ref, current_ref);
-		if (fd < 0)
-			return -1;
-	}
 
-	if (!get_recover) {
+	if (!get_recover)
 		for_each_ref(mark_complete);
-	}
 
 	if (interpret_target(target, sha1))
 		return error("Could not interpret %s as something to pull",
@@ -227,12 +218,7 @@ int pull(char *target)
 	if (loop())
 		return -1;
 
-	if (write_ref) {
-		if (current_ref) {
-			write_ref_sha1(write_ref, fd, sha1);
-		} else {
-			write_ref_sha1_unlocked(write_ref, sha1);
-		}
-	}
+	if (write_ref)
+		write_ref_sha1_unlocked(write_ref, sha1);
 	return 0;
 }

fetch.h

@@ -25,9 +25,6 @@ extern int fetch_ref(char *ref, unsigned char *sha1);
 /* If set, the ref filename to write the target value to. */
 extern const char *write_ref;
 
-/* If set, the hash that the current value of write_ref must be. */
-extern const unsigned char *current_ref;
-
 /* Set to fetch the target tree. */
 extern int get_tree;