[PATCH v2 2/3] worktree: delete dead code

["Nguyễn Thái Ngọc Duy" <pclouds@gmail.com>]

This "link" was a feature in early iterations of multiple worktree
functionality for some reason it was dropped [1]. Since nobody creates
this "link", there's no need to check it.

This is mostly used to let the user moves a worktree manually [2]. If
you move a worktree within the same file system, this hard link count
lets us know the worktree is still there even if we don't know where it
is.

We support 'worktree move' now and don't need this anymore.

[1] last appearance in v4 message-id:
    1393675983-3232-25-git-send-email-pclouds@gmail.com
    and the reason in v5 was "revisit later", message-id:
    1394246900-31535-1-git-send-email-pclouds@gmail.com
[2] 23af91d102 (prune: strategies for linked checkouts - 2014-11-30)

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
---
 Documentation/gitrepository-layout.txt | 5 -----
 builtin/worktree.c                     | 8 --------
 2 files changed, 13 deletions(-)

diff --git a/Documentation/gitrepository-layout.txt b/Documentation/gitrepository-layout.txt
index c60bcad44a..e85148f05e 100644
--- a/Documentation/gitrepository-layout.txt
+++ b/Documentation/gitrepository-layout.txt
@@ -275,11 +275,6 @@ worktrees/<id>/locked::
 	or manually by `git worktree prune`. The file may contain a string
 	explaining why the repository is locked.
 
-worktrees/<id>/link::
-	If this file exists, it is a hard link to the linked .git
-	file. It is used to detect if the linked repository is
-	manually removed.
-
 SEE ALSO
 --------
 linkgit:git-init[1],
diff --git a/builtin/worktree.c b/builtin/worktree.c
index 670555dedd..e55edf2aa5 100644
--- a/builtin/worktree.c
+++ b/builtin/worktree.c
@@ -101,15 +101,7 @@ static int prune_worktree(const char *id, struct strbuf *reason)
 	}
 	path[len] = '\0';
 	if (!file_exists(path)) {
-		struct stat st_link;
 		free(path);
-		/*
-		 * the repo is moved manually and has not been
-		 * accessed since?
-		 */
-		if (!stat(git_path("worktrees/%s/link", id), &st_link) &&
-		    st_link.st_nlink > 1)
-			return 0;
 		if (st.st_mtime <= expire) {
 			strbuf_addf(reason, _("Removing worktrees/%s: gitdir file points to non-existent location"), id);
 			return 1;
-- 
2.16.2.903.gd04caf5039