cmd/sharefs: remove readlink

This filesystem does not support symbolic links, so readlink is not useful, and unreachable in this case because of the check in getattr.

Signed-off-by: Ophestra <cat@gensokyo.uk>

cmd/sharefs/fuse-helper.h

@@ -12,7 +12,6 @@ struct sharefs_private {
 };
 
 int sharefs_getattr(const char *pathname, struct stat *statbuf, struct fuse_file_info *fi);
-int sharefs_readlink(const char *pathname, char *buf, size_t bufsiz);
 int sharefs_readdir(const char *pathname, void *buf, fuse_fill_dir_t filler, off_t offset, struct fuse_file_info *fi, enum fuse_readdir_flags flags);
 int sharefs_mkdir(const char *pathname, mode_t mode);
 int sharefs_unlink(const char *pathname);