worktree: drop unused code from get_linked_worktree()

This code has been unused since fa099d2 (worktree.c: kill parse_ref()
in favor of refs_resolve_ref_unsafe(), 2017-04-24), so drop it.

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

Author: sunshineco

worktree.c

@@ -90,9 +90,6 @@ static struct worktree *get_linked_worktree(const char *id)
 		strbuf_strip_suffix(&worktree_path, "/.");
 	}
 
-	strbuf_reset(&path);
-	strbuf_addf(&path, "%s/worktrees/%s/HEAD", get_git_common_dir(), id);
-
 	worktree = xcalloc(1, sizeof(*worktree));
 	worktree->path = strbuf_detach(&worktree_path, NULL);
 	worktree->id = xstrdup(id);